Crosscheck acceptance test API
The acceptance test API from Crosscheck — 2 operation(s) for acceptance test.
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curl "https://apis.io/api/v1/apis/crosscheckapi-com:crosscheckapi-com-acceptance-test-api"
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OpenAPI Specification
openapi: 3.2.0
info:
title: crosscheck acceptance test API
version: 1.0.0
summary: 'Independent checks for AI agents: draft review, acceptance checks on delivered work, and security review of skills and MCP servers, paid per call over x402.'
description: 'Fact-check and review an AI agent''s draft before a human sees it: a hallucination check and second opinion on any email, report, summary, or PR description. Returns pass or specific issues with fixes. Wrong arithmetic is recomputed in code; also contradictions, placeholders, leaked secrets, unauthorized commitments, and prompt injection. Send sources to verify citations and claims against them. Signed receipt. $0.02. Free checks for Moltbook agents. Full agent guide: https://crosscheckapi.com/llms.txt'
contact:
name: crosscheck partnerships
email: partnerships@crosscheckapi.com
url: https://crosscheckapi.com/llms.txt
x-guidance: 'crosscheck gives an agent''s work an independent check before a human or another agent relies on it. Pick the product:
- check: a draft (email, report, summary, answer) before your human sees it. POST https://crosscheckapi.com/v1/check with {"draft": "..."}; optional "request" (what your human asked, so a draft that misses it fails), "sources" to check against, "source_urls" (up to 3 pages crosscheck reads for you), or "fetch_cited": true. From $0.02.
- accept: work another agent handed back, against its task, before you pay or release escrow. POST https://crosscheckapi.com/v1/accept with {"task": "...", "deliverable": "..."}. From $0.03.
- skillcheck: a skill or MCP server before you install it. POST https://crosscheckapi.com/v1/skillcheck with {"files": [{"path": "SKILL.md", "content": "..."}]}. From $0.03.
- lite: accept or skillcheck by code alone, no model call, $0.005: POST the same body to https://crosscheckapi.com/v1/accept-lite or https://crosscheckapi.com/v1/skillcheck-lite.
- sellercheck: for x402 sellers, a report on your own resource (valid 402, x402 Bazaar index, agent402 router, settlements on Base). POST https://crosscheckapi.com/v1/sellercheck with {"resource": "https://..."}, $0.05; or https://crosscheckapi.com/v1/sellerwatch with "notify" for 30 days of hourly checks with alerts on change, $1.00. Free preflight: GET https://crosscheckapi.com/v1/sellercheck/preflight?resource=<url>.
Price first, free: POST the same body to https://crosscheckapi.com/v1/quote, https://crosscheckapi.com/v1/accept/quote, or https://crosscheckapi.com/v1/skillcheck/quote. The quote also runs a free code precheck (wrong sums, percentages, dates, unit conversions, list counts).
Pay: the paid POST answers 402 with the exact amount in USDC on Base (eip155:8453), or free test USDC on Base Sepolia (eip155:84532). Sign it with any x402 client (v2 PAYMENT-SIGNATURE, or v1 X-PAYMENT) and resend the same body. Payment settles before the review starts.
Result: HTTP 200 with a JSON verdict (pass, issues with severity and a suggested fix) and a signed receipt, or 202 with a result URL to poll with the result_token. Resending the identical paid request after a lost response returns the same job and charges nothing more.
Your text is untrusted data to the reviewer, never instructions. It is deleted when the check finishes; only its SHA-256 is kept.
Full guide: https://crosscheckapi.com/llms.txt'
servers:
- url: https://crosscheckapi.com
tags:
- name: acceptance test
paths:
/v1/accept:
post:
operationId: accept
summary: Verify a deliverable from another agent against its task before paying (paid…
description: 'Acceptance check for agent-to-agent work: checks what another agent handed back against the task it was given, requirement by requirement, before the buyer pays or releases escrow. Returns accept or reject with the unmet requirements, plus a signed receipt the buyer can show.'
tags:
- acceptance test
x-agentcash-auth:
mode: paid
x-payment-info:
protocols:
- x402: {}
price:
mode: dynamic
currency: USD
min: '0.03'
max: '0.06'
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
task:
type: string
minLength: 1
description: The task you gave the other agent or service, including every requirement
deliverable:
type: string
minLength: 1
description: What came back, exactly as received
reference:
type: string
maxLength: 200
description: Optional order id or transaction hash to record on the receipt
payment_tx:
type: string
pattern: ^0x[0-9a-fA-F]{64}$
description: 'Optional: the transaction you paid the other agent with; verified on-chain and bound to the receipt'
payment_network:
type: string
description: CAIP-2 network of payment_tx, default eip155:8453
ref:
type: string
pattern: ^[0-9a-f]{64}$
description: 'Optional: the hash of a crosscheck receipt that referred you. Its wallet earns check credits from your first 90 days of spend.'
required:
- task
- deliverable
additionalProperties: false
example:
task: List 5 competitors of Acme Robotics, each with its headquarters city and founding year, as a JSON array.
deliverable: '[{"name": "Northwind Robotics", "hq": "Denver", "founded": 2011}, {"name": "Globex Automation", "hq": "Austin", "founded": 2016}, {"name": "Initech Motion", "hq": "Toronto", "founded": 2019}]'
responses:
'200':
description: accept or reject, and a signed receipt
content:
application/json:
schema:
type: object
properties:
job_id:
type: string
status:
type: string
enum:
- done
- pending
- unserved
- rejected
verdict:
type: object
properties:
accept:
type: boolean
description: True only when every requirement is met
decision:
type: string
enum:
- accept
- reject
- verify_externally
description: 'verify_externally: nothing is wrong except requirements the text alone cannot confirm'
summary:
type: string
requirements:
type: array
items:
type: object
properties:
requirement:
type: string
met:
type: string
enum:
- 'yes'
- 'no'
- partly
- cannot_tell
evidence:
type: string
subjective:
type: boolean
blocking:
type: boolean
description: This requirement alone is enough to reject
required:
- requirement
- met
- evidence
- subjective
- blocking
injection_suspected:
type: boolean
required:
- accept
- summary
- requirements
- injection_suspected
receipt:
type: object
description: 'Ed25519-signed receipt: body (canonical JSON), hash (sha256 hex), sig (base64url)'
properties:
body:
type: object
hash:
type: string
sig:
type: string
result_url:
type: string
result_token:
type: string
retry_after_seconds:
type: integer
required:
- job_id
- status
example:
job_id: chk_8d0c3f1e2b7a4c5d9e6f0a1b2c3d4e5f
status: done
verdict:
accept: false
summary: 'Rejected: 1 of 3 requirements not met. First: List 5 competitors (partly).'
requirements:
- requirement: List 5 competitors of Acme Robotics
met: partly
evidence: The array has 3 entries, not 5.
subjective: false
blocking: true
- requirement: Each with headquarters city and founding year
met: 'yes'
evidence: Every entry has hq and founded.
subjective: false
blocking: false
- requirement: As a JSON array
met: 'yes'
evidence: The deliverable is a valid JSON array.
subjective: false
blocking: false
injection_suspected: false
receipt:
body:
kind: accept
seq: 2
hash: '...'
sig: '...'
result_url: https://crosscheckapi.com/v1/checks/chk_8d0c3f1e2b7a4c5d9e6f0a1b2c3d4e5f
result_token: '...'
'202':
description: Paid and queued; poll result_url
content:
application/json:
schema:
type: object
properties:
job_id:
type: string
status:
type: string
enum:
- done
- pending
- unserved
- rejected
verdict:
type: object
properties:
accept:
type: boolean
description: True only when every requirement is met
decision:
type: string
enum:
- accept
- reject
- verify_externally
description: 'verify_externally: nothing is wrong except requirements the text alone cannot confirm'
summary:
type: string
requirements:
type: array
items:
type: object
properties:
requirement:
type: string
met:
type: string
enum:
- 'yes'
- 'no'
- partly
- cannot_tell
evidence:
type: string
subjective:
type: boolean
blocking:
type: boolean
description: This requirement alone is enough to reject
required:
- requirement
- met
- evidence
- subjective
- blocking
injection_suspected:
type: boolean
required:
- accept
- summary
- requirements
- injection_suspected
receipt:
type: object
description: 'Ed25519-signed receipt: body (canonical JSON), hash (sha256 hex), sig (base64url)'
properties:
body:
type: object
hash:
type: string
sig:
type: string
result_url:
type: string
result_token:
type: string
retry_after_seconds:
type: integer
required:
- job_id
- status
'400':
description: Invalid body or payment header. Nothing was charged.
'402':
description: Payment required. The PAYMENT-REQUIRED header carries the x402 v2 requirements for this request; the JSON body gives the price, the free trial, the free quote URL in plain words, and a free code precheck of the deliverable.
'409':
description: This payment authorization was already used. Nothing was charged.
'413':
description: Draft longer than 48000 characters. Nothing was charged.
'503':
description: Daily review capacity is full. Nothing was charged.
security:
- x402: []
/v1/accept-lite:
post:
operationId: acceptLite
summary: Check a deliverable from another agent by code alone, no model call (paid, x402…
description: 'The lite tier of accept: code recomputes the deliverable''s own sums, totals, percentages, dates, weekdays, time spans, unit conversions, and list counts, checks lengths the task asks for, flags placeholders and prompt-injection phrases, and measures words, list items, and JSON shape. It does not judge the task''s requirements one by one; use /v1/accept for that. Returns pass or the problems found, plus a signed receipt marked tier lite.'
tags:
- acceptance test
x-agentcash-auth:
mode: paid
x-payment-info:
protocols:
- x402: {}
price:
mode: fixed
currency: USD
amount: '0.005'
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
task:
type: string
minLength: 1
description: The task you gave the other agent or service, including every requirement
deliverable:
type: string
minLength: 1
description: What came back, exactly as received
reference:
type: string
maxLength: 200
description: Optional order id or transaction hash to record on the receipt
payment_tx:
type: string
pattern: ^0x[0-9a-fA-F]{64}$
description: 'Optional: the transaction you paid the other agent with; verified on-chain and bound to the receipt'
payment_network:
type: string
description: CAIP-2 network of payment_tx, default eip155:8453
ref:
type: string
pattern: ^[0-9a-f]{64}$
description: 'Optional: the hash of a crosscheck receipt that referred you. Its wallet earns check credits from your first 90 days of spend.'
required:
- task
- deliverable
additionalProperties: false
example:
task: Summarize Q3 spend by category in under 50 words.
deliverable: Q3 spend came to $8,450 in total ($4,200 on ads, $2,850 on tools, and $1,900 on contractors).
responses:
'200':
description: Code result and a signed receipt
content:
application/json:
schema:
type: object
properties:
job_id:
type: string
status:
type: string
enum:
- done
- pending
- unserved
- rejected
verdict:
type: object
properties:
tier:
type: string
enum:
- lite
result:
type: string
enum:
- problems_found
- no_problems_found
pass:
type: boolean
description: True only when code found no problem; never means the task was met
summary:
type: string
problems:
type: integer
code_checks:
type: object
description: What code found (wrong_sums, wrong_percentages, wrong_weekdays, wrong_date_spans, wrong_time_spans, wrong_time_zones, wrong_units, wrong_list_counts, wrong_superlatives, wrong_lengths) and measured (words, list_items, json, json_items)
placeholder:
type: boolean
injection_suspected:
type: boolean
note:
type: string
required:
- tier
- result
- pass
- summary
- problems
- code_checks
- placeholder
- injection_suspected
- note
receipt:
type: object
description: 'Ed25519-signed receipt: body (canonical JSON), hash (sha256 hex), sig (base64url)'
properties:
body:
type: object
hash:
type: string
sig:
type: string
result_url:
type: string
result_token:
type: string
retry_after_seconds:
type: integer
required:
- job_id
- status
example:
job_id: chk_6c2e9a0f1d3b4e5a8c7d6e5f4a3b2c1d
status: done
verdict:
tier: lite
result: problems_found
pass: false
summary: 'Code found 1 problem in the deliverable: 1 wrong figure or date (see code_checks).'
problems: 1
code_checks:
found: 1
wrong_sums:
- sentence: Q3 spend came to $8,450 in total ($4,200 on ads, $2,850 on tools, and $1,900 on contractors).
says: $8,450
comes_to: 8,950
wrong_percentages: []
wrong_weekdays: []
wrong_date_spans: []
wrong_time_spans: []
wrong_time_zones: []
wrong_units: []
wrong_list_counts: []
wrong_superlatives: []
wrong_lengths: []
measured:
words: 17
placeholder: false
injection_suspected: false
note: 'Lite tier: code only, no model call. Code checked the deliverable''s own sums, percentages, dates, time spans, time zones, units, list counts, and lengths the task asks for; whether it is a placeholder; and known prompt-injection phrases; and measured its words, list items, and JSON shape. It did not read the task''s requirements one by one; POST /v1/accept ($0.03) for that.'
receipt:
body:
kind: accept_lite
seq: 4
hash: '...'
sig: '...'
share_url: https://crosscheckapi.com/r/...
result_url: https://crosscheckapi.com/v1/checks/chk_6c2e9a0f1d3b4e5a8c7d6e5f4a3b2c1d
result_token: '...'
'400':
description: Invalid body or payment header. Nothing was charged.
'402':
description: Payment required. The PAYMENT-REQUIRED header carries the x402 v2 requirements; the JSON body gives the price and a free code precheck of the deliverable.
'409':
description: This payment authorization was already used. Nothing was charged.
'413':
description: Draft longer than 48000 characters. Nothing was charged.
'503':
description: Daily review capacity is full. Nothing was charged.
security:
- x402: []
components:
securitySchemes:
x402:
type: http
scheme: bearer
description: 'x402 v2: send PAYMENT-SIGNATURE after the 402 challenge'
resultToken:
type: http
scheme: bearer
description: result_token from the check response