Roundhouse AI

Accelerometer

What changed between two dated snapshots of 129 AI-progress and technology series: per source the from/to values and dates, absolute and % change, and whether a new observation landed. Covers frontier benchmark scores, compute trends, AGI prediction-market odds, model pricing, AI stocks and crypto, energy, space, robotics, research output. Ids are YYYY-MM-DD from the free menu at /. No composite score.

SearchLiveeip155:8453Exactvia cdp
https://x402-accelerometer-feed.fly.dev/delta/:from/:to
Ai-progressAgiBenchmarksTime-seriesWhat-changed
Calls · 30d
3
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 8 snapshots so far.
$0.27
Verified settled volume
33 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
Listed price
As published in the catalog. Always read the live 402 before paying.
3
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-09-16 12:47Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xbC3A8eAc0601F717E803935cABEDeE8EDB7713C4

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.

{
  "how": "Pick two ids from GET / (free), then retry GET /ai-progress/what-changed/<from>/<to> with an x402 `payment` header.",
  "menu": "https://x402-accelerometer-feed.fly.dev/",
  "error": "payment_required",
  "price": "$0.01",
  "health": "https://x402-accelerometer-feed.fly.dev/health",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xbC3A8eAc0601F717E803935cABEDeE8EDB7713C4",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
      },
      "payTo": "5dBE1vqMVJCbxpBv9kw9nQJguUhYXk5mRGVfsxEF9cc4",
      "amount": "10000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 300
    }
  ],
  "preview": "https://x402-accelerometer-feed.fly.dev/preview",
  "networks": [
    "eip155:8453",
    "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
  ],
  "receipts": "https://x402-accelerometer-feed.fly.dev/receipt/{id}",
  "resource": {
    "url": "https://x402-accelerometer-feed.fly.dev/ai-progress/what-changed/:from/:to",
    "mimeType": "application/json"
  },
  "x402Version": 2
}

Accepts

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

0.01USDC≈ $0.01 USD
on Base · exact scheme

Pay 0.01 USDC on Base to 0xbC3A…713C4. The signed payment is good for 5 minutes.

Paid to
0xbC3A…713C4
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
10000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xbC3A8eAc0601F717E803935cABEDeE8EDB7713C4",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "pathParams": {
          "to": ":to",
          "from": ":from"
        },
        "queryParams": {}
      },
      "output": {
        "type": "json",
        "example": {
          "to": {
            "run_at": "2026-09-16T12:25:28.530204+00:00",
            "snapshot_id": "2026-09-16"
          },
          "from": {
            "run_at": "2026-07-12T14:00:05.754191+00:00",
            "snapshot_id": "2026-07-12"
          },
          "kind": "delta",
          "n_moved": 76,
          "sources": [
            {
              "id": "agents.x402_services_count",
              "to": {
                "date": "2026-09-16",
                "value": 2865
              },
              "from": {
                "date": "2026-07-12",
                "value": 1779
              },
              "unit": "count",
              "domain": "agents",
              "metric": "x402 pay-per-request services (agentic.market)",
              "delta_abs": 1086,
              "delta_pct": 61.0455,
              "new_observation": true
            },
            {
              "id": "autonomy.metr_time_horizon_50",
              "to": {
                "date": "2025-04-16",
                "value": 112.230447
              },
              "from": {
                "date": "2025-04-16",
                "value": 112.230447
              },
              "unit": "minutes",
              "domain": "autonomy",
              "metric": "METR frontier task-completion horizon @50% (minutes)",
              "delta_abs": 0,
              "delta_pct": 0,
              "new_observation": false
            }
          ],
          "composite": null,
          "n_sources": 129,
          "schema_version": "0.2"
        }
      }
    },
    "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"
              ],
              "type": "string"
            },
            "pathParams": {
              "type": "object",
              "required": [
                "from",
                "to"
              ],
              "properties": {
                "to": {
                  "type": "string",
                  "description": "later snapshot id"
                },
                "from": {
                  "type": "string",
                  "description": "earlier snapshot id"
                }
              }
            },
            "queryParams": {
              "type": "object",
              "properties": {}
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "kind",
                "from",
                "to",
                "sources"
              ],
              "properties": {
                "to": {
                  "type": "object"
                },
                "from": {
                  "type": "object"
                },
                "kind": {
                  "type": "string",
                  "const": "delta"
                },
                "n_moved": {
                  "type": "integer",
                  "description": "sources with a newer observation in `to`"
                },
                "sources": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "properties": {
                      "id": {
                        "type": "string"
                      },
                      "to": {
                        "type": "object"
                      },
                      "from": {
                        "type": [
                          "object",
                          "null"
                        ]
                      },
                      "unit": {
                        "type": "string"
                      },
                      "domain": {
                        "type": "string"
                      },
                      "metric": {
                        "type": "string"
                      },
                      "delta_abs": {
                        "type": [
                          "number",
                          "null"
                        ]
                      },
                      "delta_pct": {
                        "type": [
                          "number",
                          "null"
                        ]
                      },
                      "new_observation": {
                        "type": "boolean"
                      }
                    }
                  }
                },
                "composite": {
                  "type": "null"
                },
                "n_sources": {
                  "type": "integer"
                }
              }
            }
          }
        }
      }
    },
    "routeTemplate": "/delta/:from/:to"
  }
}

Provenance

Seen in the source catalog
2026-09-16 12:47Z
Last indexed by Roundhouse
2026-09-24 23:40Z
Last enriched (probe, favicon, geo)
2026-09-18 15:15Z
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. 8 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 Accelerometer 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=Accelerometer'
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://x402-accelerometer-feed.fly.dev/delta/:from/:to, 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.