Roundhouse AI

Machine Observer

Machine Observer premium historical snapshots across machine commerce, trust, likeness, API/data, compute, model/tool supply, and developer-adoption signals.

InferenceLiveeip155:8453Exactvia cdp
https://machineobserver.com/api/x402/history
Machine-economyHistorical-datax402AgentsIndexes
Calls · 30d
13↑ 19%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 23 snapshots so far.
$0.36
Verified settled volume
71 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0010
Listed price
As published in the catalog. Always read the live 402 before paying.
13
Calls · 30d
Upstream's own call count for this endpoint, not ours.
3
Unique payers · 30d
Last called 2026-09-22 07:35Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x55E6024b4eB9b9325537c7453F53fDA5413B8417

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x55E6024b4eB9b9325537c7453F53fDA5413B8417",
      "amount": "1000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "preview": {
    "url": "https://machineobserver.com/api/x402/history?days=30&preview=1",
    "kind": "bounded-live-proof",
    "available": true,
    "paidDelta": "Paid fulfillment returns every full stored snapshot in the requested window; the inline proof exposes inventory, coverage, and a bounded latest-snapshot summary.",
    "valueProof": {
      "note": "Payment is not recommended: all 28 snapshots in this window are already returned by the free endpoint.",
      "priceUsd": 0.001,
      "snapshotCount": 28,
      "firstRecordedAt": "2026-09-01T05:40:00.000Z",
      "latestRecordedAt": "2026-09-24T06:43:56.884Z",
      "freeTierComparison": {
        "note": "The free endpoint already returns every stored snapshot in this window. Machine Observer does not recommend paying for data it publishes for free.",
        "freeEndpoint": "https://machineobserver.com/api/v1/history?limit=100",
        "paidAddsData": false,
        "storedSnapshotsTotal": 28,
        "freeEndpointReturnsSnapshots": 28,
        "paidSnapshotsInRequestedWindow": 28,
        "additionalSnapshotsBeyondFreeTier": 0
      },
      "purchaseRecommended": false,
      "requestedWindowDays": 30,
      "paidSnapshotIncludes": [
        "sources",
        "supply",
        "developer",
        "collectionSummary",
        "indexRegistry",
        "categoryRegistry",
        "sourceHealthSummary"
      ],
      "latestSnapshotSummary": {
        "indexCount": 22,
        "recordedAt": "2026-09-24T06:43:56.884Z",
        "sourceCount": 11,
        "sourceHealth": {
          "total": 44,
          "healthy": 37,
          "degraded": 4,
          "unavailable": 3
        },
        "exampleSourceIds": [
          "agent-economy",
          "apis-guru",
          "gpu-cloud-prices"
        ],
        "collectionSummary": {
          "sourceFamilies": 5,
          "successfulFamilies": 5,
          "totalSuccessfulMeasurements": 28
        },
        "indexStatusCounts": {
          "core": 0,
          "candidate": 5,
          "experimental": 17
        },
        "healthySourceCount": 9
      }
    }
  },
  "purchase": {
    "retryUrl": "https://machineobserver.com/api/x402/history?days=30",
    "idempotency": {
      "scope": "best-effort warm-runtime response replay",
      "header": "Idempotency-Key",
      "guidance": "Send an 8-200 character Idempotency-Key on the paid retry. Reuse it with the exact request after a dropped connection to replay the successful result instead of paying again.",
      "supported": true
    },
    "instruction": "If purchaseRecommended is true and expected utility exceeds $0.001, retry purchase.retryUrl with a valid x402 payment header.",
    "apiKeyRequired": false,
    "accountRequired": false,
    "retrySameRequest": true,
    "acceptedPaymentHeaders": [
      "PAYMENT-SIGNATURE",
      "X-PAYMENT",
      "X-PAYMENT-SIGNATURE"
    ]
  },
  "resource": {
    "url": "https://machineobserver.com/api/x402/history?days=30",
    "tags": [
      "machine-economy",
      "historical-data",
      "x402",
      "agents",
      "indexes"
    ],
    "mimeType": "application/json",
    "previewUrl": "https://machineobserver.com/api/x402/history?days=30&preview=1",
    "description": "Machine Observer premium historical snapshots across machine commerce, trust, likeness, API/data, compute, model/tool supply, and developer-adoption signals.",
    "serviceName": "Machine Observer"
  },
  "buyerFlow": {
    "spendControl": "Buyer or principal retains wallet authorization. No preview, value proof, challenge, or next action authorizes payment.",
    "funnelVersion": 3,
    "recommendedSequence": [
      "inspect_live_value_proof",
      "retry_same_request_with_x402_payment"
    ]
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "days": 30
          }
        },
        "output": {
          "type": "json",
          "example": {
            "days": 30,
            "paid": true,
            "count": 2,
            "snapshots": [
              {
                "note": "Illustrative snapshot shape; paid output returns stored Machine Observer observations for the requested window.",
                "recordedAt": "2026-09-02T00:00:00.000Z"
              }
            ],
            "schemaVersion": 1
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET",
                  "HEAD",
                  "DELETE"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "properties": {
                  "days": {
                    "type": "integer",
                    "maximum": 365,
                    "minimum": 1,
                    "description": "Number of calendar days of stored Machine Observer history to return."
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object",
                "required": [
                  "schemaVersion",
                  "paid",
                  "days",
                  "count",
                  "snapshots"
                ],
                "properties": {
                  "days": {
                    "type": "integer"
                  },
                  "paid": {
                    "type": "boolean"
                  },
                  "count": {
                    "type": "integer"
                  },
                  "network": {
                    "type": "string"
                  },
                  "currency": {
                    "type": "string"
                  },
                  "priceUsd": {
                    "type": "number"
                  },
                  "protocol": {
                    "type": "string"
                  },
                  "snapshots": {
                    "type": "array",
                    "items": {
                      "type": "object"
                    }
                  },
                  "schemaVersion": {
                    "type": "integer"
                  }
                }
              }
            }
          }
        }
      }
    },
    "machineObserverOffer": {
      "value": "Machine Observer premium historical snapshots across machine commerce, trust, likeness, API/data, compute, model/tool supply, and developer-adoption signals.",
      "network": "Base",
      "paidUrl": "https://machineobserver.com/api/x402/history?days=30",
      "preview": {
        "url": "https://machineobserver.com/api/x402/history?days=30&preview=1",
        "kind": "bounded-live-proof",
        "available": true,
        "paidDelta": "Paid fulfillment returns every full stored snapshot in the requested window; the inline proof exposes inventory, coverage, and a bounded latest-snapshot summary.",
        "valueProof": {
          "note": "Payment is not recommended: all 28 snapshots in this window are already returned by the free endpoint.",
          "priceUsd": 0.001,
          "snapshotCount": 28,
          "firstRecordedAt": "2026-09-01T05:40:00.000Z",
          "latestRecordedAt": "2026-09-24T06:43:56.884Z",
          "freeTierComparison": {
            "note": "The free endpoint already returns every stored snapshot in this window. Machine Observer does not recommend paying for data it publishes for free.",
            "freeEndpoint": "https://machineobserver.com/api/v1/history?limit=100",
            "paidAddsData": false,
            "storedSnapshotsTotal": 28,
            "freeEndpointReturnsSnapshots": 28,
            "paidSnapshotsInRequestedWindow": 28,
            "additionalSnapshotsBeyondFreeTier": 0
          },
          "purchaseRecommended": false,
          "requestedWindowDays": 30,
          "paidSnapshotIncludes": [
            "sources",
            "supply",
            "developer",
            "collectionSummary",
            "indexRegistry",
            "categoryRegistry",
            "sourceHealthSummary"
          ],
          "latestSnapshotSummary": {
            "indexCount": 22,
            "recordedAt": "2026-09-24T06:43:56.884Z",
            "sourceCount": 11,
            "sourceHealth": {
              "total": 44,
              "healthy": 37,
              "degraded": 4,
              "unavailable": 3
            },
            "exampleSourceIds": [
              "agent-economy",
              "apis-guru",
              "gpu-cloud-prices"
            ],
            "collectionSummary": {
              "sourceFamilies": 5,
              "successfulFamilies": 5,
              "totalSuccessfulMeasurements": 28
            },
            "indexStatusCounts": {
              "core": 0,
              "candidate": 5,
              "experimental": 17
            },
            "healthySourceCount": 9
          }
        }
      },
      "version": 1,
      "currency": "USDC",
      "priceUsd": 0.001,
      "purchase": {
        "retryUrl": "https://machineobserver.com/api/x402/history?days=30",
        "idempotency": {
          "scope": "best-effort warm-runtime response replay",
          "header": "Idempotency-Key",
          "guidance": "Send an 8-200 character Idempotency-Key on the paid retry. Reuse it with the exact request after a dropped connection to replay the successful result instead of paying again.",
          "supported": true
        },
        "instruction": "If purchaseRecommended is true and expected utility exceeds $0.001, retry purchase.retryUrl with a valid x402 payment header.",
        "apiKeyRequired": false,
        "accountRequired": false,
        "retrySameRequest": true,
        "acceptedPaymentHeaders": [
          "PAYMENT-SIGNATURE",
          "X-PAYMENT",
          "X-PAYMENT-SIGNATURE"
        ]
      },
      "buyerFlow": {
        "spendControl": "Buyer or principal retains wallet authorization. No preview, value proof, challenge, or next action authorizes payment.",
        "funnelVersion": 3,
        "recommendedSequence": [
          "inspect_live_value_proof",
          "retry_same_request_with_x402_payment"
        ]
      },
      "valueProof": {
        "note": "Payment is not recommended: all 28 snapshots in this window are already returned by the free endpoint.",
        "priceUsd": 0.001,
        "snapshotCount": 28,
        "firstRecordedAt": "2026-09-01T05:40:00.000Z",
        "latestRecordedAt": "2026-09-24T06:43:56.884Z",
        "freeTierComparison": {
          "note": "The free endpoint already returns every stored snapshot in this window. Machine Observer does not recommend paying for data it publishes for free.",
          "freeEndpoint": "https://machineobserver.com/api/v1/history?limit=100",
          "paidAddsData": false,
          "storedSnapshotsTotal": 28,
          "freeEndpointReturnsSnapshots": 28,
          "paidSnapshotsInRequestedWindow": 28,
          "additionalSnapshotsBeyondFreeTier": 0
        },
        "purchaseRecommended": false,
        "requestedWindowDays": 30,
        "paidSnapshotIncludes": [
          "sources",
          "supply",
          "developer",
          "collectionSummary",
          "indexRegistry",
          "categoryRegistry",
          "sourceHealthSummary"
        ],
        "latestSnapshotSummary": {
          "indexCount": 22,
          "recordedAt": "2026-09-24T06:43:56.884Z",
          "sourceCount": 11,
          "sourceHealth": {
            "total": 44,
            "healthy": 37,
            "degraded": 4,
            "unavailable": 3
          },
          "exampleSourceIds": [
            "agent-economy",
            "apis-guru",
            "gpu-cloud-prices"
          ],
          "collectionSummary": {
            "sourceFamilies": 5,
            "successfulFamilies": 5,
            "totalSuccessfulMeasurements": 28
          },
          "indexStatusCounts": {
            "core": 0,
            "candidate": 5,
            "experimental": 17
          },
          "healthySourceCount": 9
        }
      },
      "nextActions": [
        "https://machineobserver.com/api/x402/best-practice",
        "https://machineobserver.com/api/x402/meta-analysis"
      ],
      "amountAtomic": "1000",
      "funnelVersion": 3,
      "freePreviewUrl": "https://machineobserver.com/api/x402/history?days=30&preview=1",
      "freeAlternative": {
        "note": "The free endpoint already returns every stored snapshot in this window. Machine Observer does not recommend paying for data it publishes for free.",
        "freeEndpoint": "https://machineobserver.com/api/v1/history?limit=100",
        "paidAddsData": false,
        "storedSnapshotsTotal": 28,
        "freeEndpointReturnsSnapshots": 28,
        "paidSnapshotsInRequestedWindow": 28,
        "additionalSnapshotsBeyondFreeTier": 0
      },
      "protocolVersions": {
        "note": "Machine Observer serves x402 v2 by default and v1 on request. Both challenges describe the same price, asset and destination.",
        "served": 2,
        "default": 2,
        "requestV1": "https://machineobserver.com/api/x402/history?days=30&x402Version=1",
        "supported": [
          1,
          2
        ],
        "alsoAccepts": "x402-version request header, or Accept: application/vnd.x402.v1+json"
      },
      "purchaseRecommended": false
    }
  },
  "valueProof": {
    "note": "Payment is not recommended: all 28 snapshots in this window are already returned by the free endpoint.",
    "priceUsd": 0.001,
    "snapshotCount": 28,
    "firstRecordedAt": "2026-09-01T05:40:00.000Z",
    "latestRecordedAt": "2026-09-24T06:43:56.884Z",
    "freeTierComparison": {
      "note": "The free endpoint already returns every stored snapshot in this window. Machine Observer does not recommend paying for data it publishes for free.",
      "freeEndpoint": "https://machineobserver.com/api/v1/history?limit=100",
      "paidAddsData": false,
      "storedSnapshotsTotal": 28,
      "freeEndpointReturnsSnapshots": 28,
      "paidSnapshotsInRequestedWindow": 28,
      "additionalSnapshotsBeyondFreeTier": 0
    },
    "purchaseRecommended": false,
    "requestedWindowDays": 30,
    "paidSnapshotIncludes": [
      "sources",
      "supply",
      "developer",
      "collectionSummary",
      "indexRegistry",
      "categoryRegistry",
      "sourceHealthSummary"
    ],
    "latestSnapshotSummary": {
      "indexCount": 22,
      "recordedAt": "2026-09-24T06:43:56.884Z",
      "sourceCount": 11,
      "sourceHealth": {
        "total": 44,
        "healthy": 37,
        "degraded": 4,
        "unavailable": 3
      },
      "exampleSourceIds": [
        "agent-economy",
        "apis-guru",
        "gpu-cloud-prices"
      ],
      "collectionSummary": {
        "sourceFamilies": 5,
        "successfulFamilies": 5,
        "totalSuccessfulMeasurements": 28
      },
      "indexStatusCounts": {
        "core": 0,
        "candidate": 5,
        "experimental": 17
      },
      "healthySourceCount": 9
    }
  },
  "x402Version": 2,
  "freeAlternative": {
    "note": "The free endpoint already returns every stored snapshot in this window. Machine Observer does not recommend paying for data it publishes for free.",
    "freeEndpoint": "https://machineobserver.com/api/v1/history?limit=100",
    "paidAddsData": false,
    "storedSnapshotsTotal": 28,
    "freeEndpointReturnsSnapshots": 28,
    "paidSnapshotsInRequestedWindow": 28,
    "additionalSnapshotsBeyondFreeTier": 0
  },
  "protocolVersions": {
    "note": "Machine Observer serves x402 v2 by default and v1 on request. Both challenges describe the same price, asset and destination.",
    "served": 2,
    "default": 2,
    "requestV1": "https://machineobserver.com/api/x402/history?days=30&x402Version=1",
    "supported": [
      1,
      2
    ],
    "alsoAccepts": "x402-version request header, or Accept: application/vnd.x402.v1+json"
  },
  "purchaseRecommended": false
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.001USDC≈ $0.001 USD
on Base · exact scheme

Pay 0.001 USDC on Base to 0x55E6…B8417. The signed payment is good for 5 minutes.

Paid to
0x55E6…B8417
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
1000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x55E6024b4eB9b9325537c7453F53fDA5413B8417",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "days": 30
        }
      },
      "output": {
        "type": "json",
        "example": {
          "days": 30,
          "paid": true,
          "count": 2,
          "snapshots": [
            {
              "note": "Illustrative snapshot shape; paid output returns stored Machine Observer observations for the requested window.",
              "recordedAt": "2026-09-02T00:00:00.000Z"
            }
          ],
          "schemaVersion": 1
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "properties": {
                "days": {
                  "type": "integer",
                  "maximum": 365,
                  "minimum": 1,
                  "description": "Number of calendar days of stored Machine Observer history to return."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "schemaVersion",
                "paid",
                "days",
                "count",
                "snapshots"
              ],
              "properties": {
                "days": {
                  "type": "integer"
                },
                "paid": {
                  "type": "boolean"
                },
                "count": {
                  "type": "integer"
                },
                "network": {
                  "type": "string"
                },
                "currency": {
                  "type": "string"
                },
                "priceUsd": {
                  "type": "number"
                },
                "protocol": {
                  "type": "string"
                },
                "snapshots": {
                  "type": "array",
                  "items": {
                    "type": "object"
                  }
                },
                "schemaVersion": {
                  "type": "integer"
                }
              }
            }
          }
        }
      }
    }
  },
  "machineObserverOffer": {
    "value": "Machine Observer premium historical snapshots across machine commerce, trust, likeness, API/data, compute, model/tool supply, and developer-adoption signals.",
    "network": "Base",
    "paidUrl": "https://machineobserver.com/api/x402/history?days=30",
    "preview": {
      "url": "https://machineobserver.com/api/x402/history?days=30&preview=1",
      "kind": "bounded-live-proof",
      "available": true,
      "paidDelta": "Paid fulfillment returns every full stored snapshot in the requested window; the inline proof exposes inventory, coverage, and a bounded latest-snapshot summary.",
      "valueProof": {
        "note": "Payment is not recommended: all 6 snapshots in this window are already returned by the free endpoint.",
        "priceUsd": 0.001,
        "snapshotCount": 6,
        "firstRecordedAt": "2026-09-01T05:40:00.000Z",
        "latestRecordedAt": "2026-09-05T06:37:08.498Z",
        "freeTierComparison": {
          "note": "The free endpoint already returns every stored snapshot in this window. Machine Observer does not recommend paying for data it publishes for free.",
          "freeEndpoint": "https://machineobserver.com/api/v1/history?limit=100",
          "paidAddsData": false,
          "storedSnapshotsTotal": 6,
          "freeEndpointReturnsSnapshots": 6,
          "paidSnapshotsInRequestedWindow": 6,
          "additionalSnapshotsBeyondFreeTier": 0
        },
        "purchaseRecommended": false,
        "requestedWindowDays": 30,
        "paidSnapshotIncludes": [
          "sources",
          "supply",
          "developer",
          "collectionSummary",
          "indexRegistry",
          "categoryRegistry",
          "sourceHealthSummary"
        ],
        "latestSnapshotSummary": {
          "indexCount": 18,
          "recordedAt": "2026-09-05T06:37:08.498Z",
          "sourceCount": 11,
          "sourceHealth": {
            "total": 44,
            "healthy": 33,
            "degraded": 9,
            "unavailable": 2
          },
          "exampleSourceIds": [
            "agent-economy",
            "apis-guru",
            "gpu-cloud-prices"
          ],
          "collectionSummary": {
            "sourceFamilies": 5,
            "successfulFamilies": 5,
            "totalSuccessfulMeasurements": 28
          },
          "indexStatusCounts": {
            "core": 0,
            "candidate": 18,
            "experimental": 0
          },
          "healthySourceCount": 10
        }
      }
    },
    "version": 1,
    "currency": "USDC",
    "priceUsd": 0.001,
    "purchase": {
      "retryUrl": "https://machineobserver.com/api/x402/history?days=30",
      "idempotency": {
        "scope": "best-effort warm-runtime response replay",
        "header": "Idempotency-Key",
        "guidance": "Send an 8-200 character Idempotency-Key on the paid retry. Reuse it with the exact request after a dropped connection to replay the successful result instead of paying again.",
        "supported": true
      },
      "instruction": "If purchaseRecommended is true and expected utility exceeds $0.001, retry purchase.retryUrl with a valid x402 payment header.",
      "apiKeyRequired": false,
      "accountRequired": false,
      "retrySameRequest": true,
      "acceptedPaymentHeaders": [
        "PAYMENT-SIGNATURE",
        "X-PAYMENT",
        "X-PAYMENT-SIGNATURE"
      ]
    },
    "buyerFlow": {
      "spendControl": "Buyer or principal retains wallet authorization. No preview, value proof, challenge, or next action authorizes payment.",
      "funnelVersion": 3,
      "recommendedSequence": [
        "inspect_live_value_proof",
        "retry_same_request_with_x402_payment"
      ]
    },
    "valueProof": {
      "note": "Payment is not recommended: all 6 snapshots in this window are already returned by the free endpoint.",
      "priceUsd": 0.001,
      "snapshotCount": 6,
      "firstRecordedAt": "2026-09-01T05:40:00.000Z",
      "latestRecordedAt": "2026-09-05T06:37:08.498Z",
      "freeTierComparison": {
        "note": "The free endpoint already returns every stored snapshot in this window. Machine Observer does not recommend paying for data it publishes for free.",
        "freeEndpoint": "https://machineobserver.com/api/v1/history?limit=100",
        "paidAddsData": false,
        "storedSnapshotsTotal": 6,
        "freeEndpointReturnsSnapshots": 6,
        "paidSnapshotsInRequestedWindow": 6,
        "additionalSnapshotsBeyondFreeTier": 0
      },
      "purchaseRecommended": false,
      "requestedWindowDays": 30,
      "paidSnapshotIncludes": [
        "sources",
        "supply",
        "developer",
        "collectionSummary",
        "indexRegistry",
        "categoryRegistry",
        "sourceHealthSummary"
      ],
      "latestSnapshotSummary": {
        "indexCount": 18,
        "recordedAt": "2026-09-05T06:37:08.498Z",
        "sourceCount": 11,
        "sourceHealth": {
          "total": 44,
          "healthy": 33,
          "degraded": 9,
          "unavailable": 2
        },
        "exampleSourceIds": [
          "agent-economy",
          "apis-guru",
          "gpu-cloud-prices"
        ],
        "collectionSummary": {
          "sourceFamilies": 5,
          "successfulFamilies": 5,
          "totalSuccessfulMeasurements": 28
        },
        "indexStatusCounts": {
          "core": 0,
          "candidate": 18,
          "experimental": 0
        },
        "healthySourceCount": 10
      }
    },
    "nextActions": [
      "https://machineobserver.com/api/x402/best-practice",
      "https://machineobserver.com/api/x402/meta-analysis"
    ],
    "amountAtomic": "1000",
    "funnelVersion": 3,
    "freePreviewUrl": "https://machineobserver.com/api/x402/history?days=30&preview=1",
    "freeAlternative": {
      "note": "The free endpoint already returns every stored snapshot in this window. Machine Observer does not recommend paying for data it publishes for free.",
      "freeEndpoint": "https://machineobserver.com/api/v1/history?limit=100",
      "paidAddsData": false,
      "storedSnapshotsTotal": 6,
      "freeEndpointReturnsSnapshots": 6,
      "paidSnapshotsInRequestedWindow": 6,
      "additionalSnapshotsBeyondFreeTier": 0
    },
    "protocolVersions": {
      "note": "Machine Observer serves x402 v2 by default and v1 on request. Both challenges describe the same price, asset and destination.",
      "served": 2,
      "default": 2,
      "requestV1": "https://machineobserver.com/api/x402/history?days=30&x402Version=1",
      "supported": [
        1,
        2
      ],
      "alsoAccepts": "x402-version request header, or Accept: application/vnd.x402.v1+json"
    },
    "purchaseRecommended": false
  }
}

Provenance

Seen in the source catalog
2026-09-05 14:13Z
Last indexed by Roundhouse
2026-09-25 00:50Z
Last enriched (probe, favicon, geo)
2026-09-24 12:45Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 402
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 23 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service Machine Observer and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Machine%20Observer'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://machineobserver.com/api/x402/history, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.