Attest
Attest a decision: sign (input_hash, output_hash, decision) yourself, or omit the signature and the treasury signs — then dual-chain anchor. Free re-verify at /v1/attest/verify. $0.01 USDC.
Offering
- Provider
- api.anchor-x402.com
- Method
- POST
- Offering type
- Api Endpoint
- Transport type
- http
- Category
- Blockchain And Crypto
- Delivery
- Not provided
- Pricing model
- Not provided
- x402 version
- 2
Endpoint context
- URL
https://api.anchor-x402.com/v1/attest- MIME type
- Not provided
- First seen
- 2026-10-16T01:50:10.647Z
- Last seen
- Tags
- attestation, signature, verify, anchor
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 - Payment option 3
- 10000 atomic units
Atomic price: 10000 · Network: eip155:5042 · Asset: 0x3600000000000000000000000000000000000000 · Scheme: exact - Payment option 4
- 2000000000000000000 atomic units
Atomic price: 2000000000000000000 · Network: eip155:137 · Asset: 0x431D5dfF03120AFA4bDf332c61A6e1766eF37BDB · Scheme: exact
Raw x402 terms
[
{
"scheme": "exact",
"network": "eip155:8453",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "10000",
"payTo": "0x127462e296fAc1A7F5cF33bA57bB2f0FFf5cD0B6"
},
{
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"amount": "10000",
"payTo": "6apuZvJQ51Led9iEjnHw6f5jfnXL4qjt8S1h58PeXzuR"
},
{
"scheme": "exact",
"network": "eip155:5042",
"asset": "0x3600000000000000000000000000000000000000",
"amount": "10000",
"payTo": "0x127462e296fAc1A7F5cF33bA57bB2f0FFf5cD0B6"
},
{
"scheme": "exact",
"network": "eip155:137",
"asset": "0x431D5dfF03120AFA4bDf332c61A6e1766eF37BDB",
"amount": "2000000000000000000",
"payTo": "0x127462e296fAc1A7F5cF33bA57bB2f0FFf5cD0B6"
}
]Observed health
- Status
- Reachable
- Latest latency
- 31 ms
- Average latency
- 32 ms
- HTTP status
- 405
- Last checked
- Reachability
- 100% over 15 checks
Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.
Input schema
{
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"decision": {
"description": "Free-form short label.",
"maxLength": 64,
"type": "string"
},
"input_hash": {
"description": "64-char hex SHA-256 of the agent's input.",
"type": "string"
},
"output_hash": {
"description": "64-char hex SHA-256 of the agent's output / decision payload.",
"type": "string"
},
"scheme": {
"enum": [
"eip191",
"ed25519"
],
"type": "string"
},
"signature": {
"description": "0x-prefixed hex (eip191) or base58 (ed25519).",
"type": "string"
},
"signer_pubkey": {
"description": "Required for ed25519. Ignored for eip191.",
"type": "string"
}
},
"required": [
"input_hash",
"output_hash",
"decision"
]
},
"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 schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"decision": {
"description": "Free-form short label.",
"maxLength": 64,
"type": "string"
},
"input_hash": {
"description": "64-char hex SHA-256 of the agent's input.",
"type": "string"
},
"output_hash": {
"description": "64-char hex SHA-256 of the agent's output / decision payload.",
"type": "string"
},
"scheme": {
"enum": [
"eip191",
"ed25519"
],
"type": "string"
},
"signature": {
"description": "0x-prefixed hex (eip191) or base58 (ed25519).",
"type": "string"
},
"signer_pubkey": {
"description": "Required for ed25519. Ignored for eip191.",
"type": "string"
}
},
"required": [
"input_hash",
"output_hash",
"decision"
]
},
"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": {
"properties": {
"base": {
"anyOf": [
{
"properties": {
"explorer_url": {
"type": "string"
},
"tx": {
"type": "string"
}
},
"required": [
"tx",
"explorer_url"
],
"type": "object"
},
{
"type": "null"
}
]
},
"decision": {
"type": "string"
},
"merkle_root": {
"type": "string"
},
"signed_at": {
"type": "integer"
},
"signed_by": {
"type": "string"
},
"signer": {
"type": "string"
},
"signer_verified": {
"type": "boolean"
},
"solana": {
"anyOf": [
{
"properties": {
"explorer_url": {
"type": "string"
},
"tx": {
"type": "string"
}
},
"required": [
"tx",
"explorer_url"
],
"type": "object"
},
{
"type": "null"
}
]
},
"verify_url": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
}
},
"required": [
"merkle_root",
"signer_verified",
"signer",
"decision",
"signed_at"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}