anchor-x402 Attest API
The Attest API from anchor-x402 — 2 operation(s) for attest.
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OpenAPI Specification
openapi: 3.2.0
info:
title: anchor-x402 Attest API
description: 18 pay-per-call x402 services for AI agents — on-chain anchoring & attestation, wallet/address security screening, Web3 data (tx & calldata decode, ENS, token prices), x402 spend accounting, content analysis, and verifiable randomness. No API keys or accounts; settle per request in USDC on Base or Solana. $0.001–$1.77 per call.
version: 0.3.0
x-guidance: Pay-per-call x402 services for AI agents — no API keys or accounts. Each paid route returns HTTP 402 with x402 payment requirements; pay in USDC on Base or Solana (select routes also settle JPYC on Polygon) and retry with the payment header. Prices are $0.001–$1.77 per call. POST routes take a JSON body per each operation's requestBody schema.
contact:
email: hypeprinter007@gmail.com
x-logo:
url: https://api.anchor-x402.com/icon.png
altText: anchor-x402
tags:
- name: Attest
paths:
/v1/attest:
post:
summary: Create a signed, anchored receipt for an AI decision
operationId: attest_v1_attest_post
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/AttestRequest'
responses:
'200':
description: Successful Response
content:
application/json:
schema:
$ref: '#/components/schemas/AttestResponse'
'422':
description: Validation Error
content:
application/json:
schema:
$ref: '#/components/schemas/HTTPValidationError'
'402':
description: Payment Required
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.010000'
protocols:
- x402: {}
tags:
- Attest
/v1/attest/verify:
post:
summary: Verify a previously anchored decision attestation
operationId: attest_verify_v1_attest_verify_post
requestBody:
content:
application/json:
schema:
$ref: '#/components/schemas/AttestVerifyRequest'
required: true
responses:
'200':
description: Successful Response
content:
application/json:
schema:
$ref: '#/components/schemas/AttestVerifyResponse'
'422':
description: Validation Error
content:
application/json:
schema:
$ref: '#/components/schemas/HTTPValidationError'
security: []
tags:
- Attest
components:
schemas:
ValidationError:
properties:
loc:
items:
anyOf:
- type: string
- type: integer
type: array
title: Location
msg:
type: string
title: Message
type:
type: string
title: Error Type
input:
title: Input
ctx:
type: object
title: Context
type: object
required:
- loc
- msg
- type
title: ValidationError
AttestRequest:
properties:
input_hash:
type: string
title: Input Hash
description: 64-char hex SHA-256 of the agent's input.
output_hash:
type: string
title: Output Hash
description: 64-char hex SHA-256 of the agent's output / decision payload.
decision:
type: string
maxLength: 64
title: Decision
description: Free-form short label, e.g. "APPROVED", "REJECTED", "CONFIDENCE=0.93".
scheme:
anyOf:
- type: string
enum:
- eip191
- ed25519
- type: 'null'
title: Scheme
description: 'Signature scheme when you supply a `signature`: "eip191" (EVM) or "ed25519" (Solana).'
signature:
anyOf:
- type: string
- type: 'null'
title: Signature
description: 0x-prefixed hex (eip191) or base58 (ed25519). Omit to have the anchor-x402 treasury sign for you (hosted-signer mode, for wallet-less agents).
signer_pubkey:
anyOf:
- type: string
- type: 'null'
title: Signer Pubkey
description: Required for ed25519 (Solana base58 pubkey). Ignored for eip191 — address is recovered.
type: object
required:
- input_hash
- output_hash
- decision
title: AttestRequest
AttestResponse:
properties:
merkle_root:
type: string
title: Merkle Root
description: SHA-256 over the domain-separated (input_hash, output_hash, decision) — this is what gets anchored.
signer_verified:
type: boolean
title: Signer Verified
signer:
type: string
title: Signer
description: Recovered EVM address (eip191) or supplied Solana pubkey (ed25519).
base:
anyOf:
- $ref: '#/components/schemas/ChainAnchor'
- type: 'null'
solana:
anyOf:
- $ref: '#/components/schemas/ChainAnchor'
- type: 'null'
decision:
type: string
title: Decision
signed_at:
type: integer
title: Signed At
signed_by:
type: string
title: Signed By
description: '"caller" (you supplied the signature) or "treasury" (hosted-signer mode).'
default: caller
verify_url:
anyOf:
- type: string
- type: 'null'
title: Verify Url
description: Free endpoint a relying party POSTs this receipt to for independent re-verification.
type: object
required:
- merkle_root
- signer_verified
- signer
- decision
- signed_at
title: AttestResponse
AttestVerifyResponse:
properties:
valid:
type: boolean
title: Valid
description: True iff signature verified AND the Base tx confirms the exact root.
merkle_root:
type: string
title: Merkle Root
signature_valid:
type: boolean
title: Signature Valid
signer:
type: string
title: Signer
anchor_confirmed:
type: boolean
title: Anchor Confirmed
root_matches:
type: boolean
title: Root Matches
anchored_at_block:
anyOf:
- type: integer
- type: 'null'
title: Anchored At Block
anchored_at_time:
anyOf:
- type: integer
- type: 'null'
title: Anchored At Time
notes:
type: string
title: Notes
type: object
required:
- valid
- merkle_root
- signature_valid
- signer
- anchor_confirmed
- root_matches
- notes
title: AttestVerifyResponse
ChainAnchor:
properties:
tx:
type: string
title: Tx
explorer_url:
type: string
title: Explorer Url
type: object
required:
- tx
- explorer_url
title: ChainAnchor
AttestVerifyRequest:
properties:
input_hash:
type: string
title: Input Hash
description: 64-char hex SHA-256 of the agent's input.
output_hash:
type: string
title: Output Hash
description: 64-char hex SHA-256 of the agent's output / decision payload.
decision:
type: string
maxLength: 64
title: Decision
scheme:
type: string
enum:
- eip191
- ed25519
title: Scheme
description: '"eip191" or "ed25519" — matches the receipt.'
signature:
type: string
title: Signature
description: The signature from the receipt.
signer_pubkey:
anyOf:
- type: string
- type: 'null'
title: Signer Pubkey
description: Required for ed25519.
base_tx:
type: string
title: Base Tx
description: 0x-prefixed Base tx hash returned by the mint.
type: object
required:
- input_hash
- output_hash
- decision
- scheme
- signature
- base_tx
title: AttestVerifyRequest
description: 'A minted receipt submitted for free re-verification: the signed tuple plus
the signature and the Base tx that should carry the anchored root.'
HTTPValidationError:
properties:
detail:
items:
$ref: '#/components/schemas/ValidationError'
type: array
title: Detail
type: object
title: HTTPValidationError