Index onlineMerchant portal
Api Endpoint

agents.factstamp.dev

For a document that quotes figures, names companies or cites papers: post the text and every checkable claim comes back verified against dated primary sources, as one signed bundle with a per-claim receipt and its licence. Claims we cannot answer are named and never charged, and the preview is free. Verdicts: verified, stale, contradicted, unknown. Prose, not a list: a bare bibliography belongs to /bulk.

Open interactive test console

Offering

Provider
agents.factstamp.dev
Method
POST
Offering type
Api Endpoint
Transport type
http
Category
Other
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://agents.factstamp.dev/document
MIME type
Not provided
First seen
2026-10-23T22:25:34.290Z
Last seen
Tags
None supplied

Website

Payment pricing

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

Payment option 1
0.25 USDC
Atomic price: 250000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "250000",
    "payTo": "0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32"
  }
]

Observed health

Status
Reachable
Latest latency
1274 ms
Average latency
808 ms
HTTP status
405
Last checked
Reachability
100% over 7 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": {
      "const": "http"
    },
    "method": {
      "const": "POST"
    },
    "bodyType": {
      "const": "application/json"
    },
    "body": {
      "type": "object"
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": true
}

Output schema

{
  "type": "object",
  "properties": {
    "type": {
      "const": "json"
    },
    "example": {
      "type": "object"
    }
  },
  "required": [
    "type",
    "example"
  ],
  "additionalProperties": true
}