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Api Endpoint

x402-accelerometer-feed.fly.dev

Use this when the question is what moved in AI progress between two dates: the acceleration between two readings of 129 series (benchmarks, compute, AGI odds, model pricing, AI stocks and crypto, energy, space, robotics, research output). Per series: from/to value and date, absolute and % change, and whether a new observation landed. Dates are YYYY-MM-DD ids from the free menu at /.

Open interactive test console

Offering

Provider
x402-accelerometer-feed.fly.dev
Method
GET
Offering type
Api Endpoint
Transport type
http
Category
Science And Education
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://x402-accelerometer-feed.fly.dev/ai-progress/what-changed/:from/:to
MIME type
application/json
First seen
2026-10-16T01:51:51.176Z
Last seen
Tags
ai-progress, agi, benchmarks, time-series, what-changed

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.01 USDC
Atomic price: 10000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2
0.01 USDC
Atomic price: 10000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "payTo": "0xbC3A8eAc0601F717E803935cABEDeE8EDB7713C4"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "10000",
    "payTo": "5dBE1vqMVJCbxpBv9kw9nQJguUhYXk5mRGVfsxEF9cc4"
  }
]

Observed health

Status
Healthy
Latest latency
123 ms
Average latency
1769 ms
HTTP status
402
Last checked
Reachability
85.7% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {}
    },
    "pathParams": {
      "type": "object",
      "properties": {
        "from": {
          "type": "string",
          "description": "earlier reading id"
        },
        "to": {
          "type": "string",
          "description": "later reading id"
        }
      },
      "required": [
        "from",
        "to"
      ]
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string"
    },
    "example": {
      "type": "object",
      "properties": {
        "kind": {
          "type": "string",
          "const": "delta"
        },
        "from": {
          "type": "object"
        },
        "to": {
          "type": "object"
        },
        "n_sources": {
          "type": "integer"
        },
        "n_moved": {
          "type": "integer",
          "description": "sources with a newer observation in `to`"
        },
        "composite": {
          "type": "null"
        },
        "sources": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "id": {
                "type": "string"
              },
              "metric": {
                "type": "string"
              },
              "domain": {
                "type": "string"
              },
              "unit": {
                "type": "string"
              },
              "from": {
                "type": [
                  "object",
                  "null"
                ]
              },
              "to": {
                "type": "object"
              },
              "delta_abs": {
                "type": [
                  "number",
                  "null"
                ]
              },
              "delta_pct": {
                "type": [
                  "number",
                  "null"
                ]
              },
              "new_observation": {
                "type": "boolean"
              }
            }
          }
        }
      },
      "required": [
        "kind",
        "from",
        "to",
        "sources"
      ]
    }
  },
  "required": [
    "type"
  ]
}