Roundhouse

api.onesource.io

The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Chain-read protocol constants: base rate, epoch length, floors, and where each one was last read from.

OtherLiveeip155:8453Exactvia cdp
https://api.onesource.io/standard/v1/constants
Calls · 30d
15
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 10 snapshots so far.
$20.97
Verified settled volume
A floor: summed over 5,000 of up to 90,574 indexed settlements. The exact verified count is not computed for a wallet this size.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
16
Calls · 30d
Upstream's own call count for this endpoint, not ours.
16
Unique payers · 30d
Last called 2026-09-24 01:22Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea

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.

{
  "meta": {
    "network": "eip155:8453",
    "endpoint": "/v1/constants",
    "cost_usdc": "0.005"
  },
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2",
        "credentialTypes": [
          "authorization"
        ]
      },
      "payTo": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "recipient": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea",
      "maxAmountRequired": "5000",
      "maxTimeoutSeconds": 3600
    }
  ],
  "resource": {
    "url": "https://api.onesource.io/standard/v1/constants",
    "mimeType": "application/json",
    "description": "The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Chain-read protocol constants: base rate, epoch length, floors, and where each one was last read from."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {}
        },
        "output": {
          "type": "json",
          "example": {
            "network": "robinhood",
            "chain_id": 4663,
            "constants": [
              {
                "key": "license_floor_price",
                "basis": "measured",
                "read_at": "2026-09-15T03:00:00Z",
                "source_fn": "floorPrice",
                "value_num": "50000000000000000",
                "read_block": 63512040,
                "value_text": null,
                "source_contract": "0xa45ce49303eed5846f841bfd4bac6ae8c805ec05"
              }
            ]
          }
        }
      },
      "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": {}
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object",
                "properties": {
                  "network": {
                    "type": "string"
                  },
                  "chain_id": {
                    "type": "integer"
                  },
                  "constants": {
                    "type": "array",
                    "items": {
                      "type": "object",
                      "properties": {
                        "key": {
                          "type": "string"
                        },
                        "basis": {
                          "type": "string"
                        },
                        "read_at": {
                          "type": "string"
                        },
                        "source_fn": {
                          "type": "string"
                        },
                        "value_num": {
                          "type": "string"
                        },
                        "read_block": {
                          "type": "integer"
                        },
                        "value_text": {
                          "type": [
                            "string",
                            "null"
                          ]
                        },
                        "source_contract": {
                          "type": "string"
                        }
                      }
                    }
                  }
                },
                "description": "Endpoint-specific response payload"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2,
  "payment_rails": [
    {
      "rail": "x402",
      "chain": "eip155:8453",
      "assets": [
        "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
      ],
      "recipient": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea"
    },
    {
      "rail": "mpp",
      "chain": "tempo:4217",
      "assets": [
        "0x20c000000000000000000000b9537d11c60e8b50",
        "0x20c0000000000000000000000000000000000000"
      ],
      "recipient": "0x19B8e99079A5558ff4460357b0a78e14a7F600B7"
    }
  ],
  "api_key_subscription": {
    "url": "https://onesource.io/rest-api#pricing",
    "description": "Alternative to paying per call: a flat-rate monthly subscription authenticated with `Authorization: Bearer <key>`. No wallet, stablecoin, or on-chain settlement required. Use this if the client cannot custody a private key, if billing must be invoiced, or if per-call pricing costs more than a flat fee at your volume."
  }
}

Accepts

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

0.005USDC≈ $0.005 USD
on Base · exact scheme

Pay 0.005 USDC on Base to 0x52E2…1f3ea. The signed payment is good for 1 hour.

Paid to
0x52E2…1f3ea
USD Coin contract
0x8335…02913
Payment window
1 hour
As published
5000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2",
      "credentialTypes": [
        "authorization"
      ]
    },
    "payTo": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "recipient": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea",
    "maxAmountRequired": "5000",
    "maxTimeoutSeconds": 3600
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {}
      },
      "output": {
        "type": "json",
        "example": {
          "network": "robinhood",
          "chain_id": 4663,
          "constants": [
            {
              "key": "license_floor_price",
              "basis": "measured",
              "read_at": "2026-09-15T03:00:00Z",
              "source_fn": "floorPrice",
              "value_num": "50000000000000000",
              "read_block": 63512040,
              "value_text": null,
              "source_contract": "0xa45ce49303eed5846f841bfd4bac6ae8c805ec05"
            }
          ]
        }
      }
    },
    "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": {}
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "properties": {
                "network": {
                  "type": "string"
                },
                "chain_id": {
                  "type": "integer"
                },
                "constants": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "properties": {
                      "key": {
                        "type": "string"
                      },
                      "basis": {
                        "type": "string"
                      },
                      "read_at": {
                        "type": "string"
                      },
                      "source_fn": {
                        "type": "string"
                      },
                      "value_num": {
                        "type": "string"
                      },
                      "read_block": {
                        "type": "integer"
                      },
                      "value_text": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "source_contract": {
                        "type": "string"
                      }
                    }
                  }
                }
              },
              "description": "Endpoint-specific response payload"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-24 09:43Z
Last indexed by Roundhouse
2026-09-24 10:40Z
Last enriched (probe, favicon, geo)
2026-09-15 12:16Z
x402 version
2
Max timeout
3600s
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. 10 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 api.onesource.io 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=api.onesource.io'
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://api.onesource.io/standard/v1/constants, 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.