Clearsigned — the trust layer with no stake in the outcome
Clearsigned — the trust layer with no stake in the outcome. Submit {claim, evidence[]}, receive an Ed25519-SIGNED, evidence-bearing receipt (verify offline against GET /pubkey; every receipt is chained in the public ledger at GET /ledger/verify). Flat price, verdict-independent; refunds only for failure to deliver. Current mode is honestly labeled in each receipt.
10000 (raw units)
price
4
calls / 30d
4
unique payers
2026-09-17
updated
Provider
verify.clearsigned.com · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x7904e8De283960F4176c44690f34aF7Da47Dc75C",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "10000",
"maxTimeoutSeconds": 300
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"body": {
"claim": "The Eiffel Tower is located in Paris, France.",
"evidence": []
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"checks_run": [
{
"name": "claim_sha256",
"observation": "sha256:8696…",
"pass": true
}
],
"delivered": true,
"price_basis": "flat-per-call, verdict-independent",
"price_usdc": "0.01",
"receipt_id": "5285caf7-6e79-456e-8669-ab2f4b025131",
"signature": {
"alg": "ed25519",
"key_id": "6eb6ca2ac41e690f"
},
"sku": "t1-stub"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"claim": {
"description": "The claim to verify (max 10k chars)",
"type": "string"
},
"evidence": {
"description": "Supporting material; admitted as secondary-tier evidence",
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"claim"
]
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
}Use it
curl
curl "https://verify.clearsigned.com/verify/t1" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://verify.clearsigned.com/verify/t1");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://verify.clearsigned.com/verify/t1")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/6512.json, and this resource appears in /discovery/resources and /discovery/search.