Annalist Checks API
The checks API from Annalist — 4 operation(s) for checks.
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OpenAPI Specification
openapi: 3.2.0
info:
title: Annalist Dev Checks API
version: 0.9.0
x-guidance: 'Annalist sells signed data for agents, priced per call over x402 (USDC on Base or Solana). Start with the free GET /v1/catalog: every paid route with the question it answers, its price and an example. Hyperliquid in one call: GET /v1/perp/full?coin=BTC (crowd state, smart-money positioning, liquidation levels). Before paying an x402 service: GET /v1/checks/service?host=, or the free GET /v1/verify/attestation?host=. Before connecting an MCP server: GET /v1/mcp/server?url=, or the free GET /v1/verify/mcp?url=. Before an agent shops on a site: the free GET /v1/verify/store?domain=, or GET /v1/web/readiness?domain=. Every answer is Ed25519-signed; the key is at /.well-known/annalist-key.json. Not investment advice.'
description: 'Operations tagged checks across 2 of this provider''s published API definitions: annalist-dev-openapi.json, openapi.json. Each path carries the servers of the definition it was published in.'
servers:
- url: https://api.annalist.dev
tags:
- name: Checks
paths:
/v1/checks/service:
get:
operationId: checks_service
tags:
- Checks
summary: Is this x402 service real and reliable, and does it charge what it lists?
description: 'Use before paying an x402 service: independent checks by host or URL. Uptime and latency from repeated unpaid probes, whether the quoted price and payout wallet match the listing, real on-chain usage over 30 days with fake volume removed (self-funded payers, crawler bots, one-wallet dominance), test purchases and domain age, with a grade and reasons. Rankings are never for sale. Signed.'
x-price: $0.01
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.010000'
protocols:
- x402: {}
parameters:
- name: host
in: query
required: false
schema:
type: string
description: host name, for example api.example.com
- name: url
in: query
required: false
schema:
type: string
description: or any URL on the service
responses:
'200':
description: Signed data
content:
application/json:
schema:
type: object
required:
- as_of
- data
- signature
properties:
as_of:
type: string
format: date-time
data:
type: object
method:
type: object
request_id:
type: string
stale:
type: boolean
sources:
type: array
items:
type: string
notice:
type: string
key_id:
type: string
signature:
type: string
description: Ed25519 over RFC 8785 canonical JSON of {as_of, data, method, request_id}
signature_info:
type: string
example:
data:
host: api.example.com
grade: B
reasons:
- quoted price matches listing
reliability:
up_share_7d: 0.98
usage:
organic_payers_30d: 41
flags: []
'402':
description: Payment required (x402 v2, USDC on Base or Solana)
servers:
- url: https://api.annalist.dev
/v1/checks/seller:
get:
operationId: checks_seller
tags:
- Checks
summary: Is the revenue behind this x402 payout wallet real, and which services use it?
description: 'Checks for an x402 seller wallet on Base: the services that pay out to it and their grades, and USDC received over 30 days with payers, repeat payers and fake-volume signals (payers the seller funded, crawler bots, one-wallet dominance). Signed.'
x-price: $0.01
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.010000'
protocols:
- x402: {}
parameters:
- name: address
in: query
required: true
schema:
type: string
pattern: ^0x[0-9a-fA-F]{40}$
responses:
'200':
description: Signed data
content:
application/json:
schema:
type: object
required:
- as_of
- data
- signature
properties:
as_of:
type: string
format: date-time
data:
type: object
method:
type: object
request_id:
type: string
stale:
type: boolean
sources:
type: array
items:
type: string
notice:
type: string
key_id:
type: string
signature:
type: string
description: Ed25519 over RFC 8785 canonical JSON of {as_of, data, method, request_id}
signature_info:
type: string
example:
data:
address: 0xde48...
services:
- host: api.example.com
grade: B
usage:
payments_30d: 900
'402':
description: Payment required (x402 v2, USDC on Base or Solana)
servers:
- url: https://api.annalist.dev
/v1/checks/top:
get:
operationId: checks_top
tags:
- Checks
summary: Which x402 services have the most real customers and the best reliability, and…
description: 'Leaderboards from our independent checks of x402 services: most real (wash-adjusted) paying customers, most reliable, and flagged services (price or wallet mismatches, outages, mostly bot traffic, self-funded volume), with the method. With category= (shopping, ai-inference, crypto-data...), one category''s boards. Rankings are never for sale. Signed.'
x-price: $0.02
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.020000'
protocols:
- x402: {}
parameters:
- name: category
in: query
required: false
schema:
type: string
description: 'optional: shopping, ai-inference, crypto-data, crypto-signals, search-web and others; one category''s boards'
responses:
'200':
description: Signed data
content:
application/json:
schema:
type: object
required:
- as_of
- data
- signature
properties:
as_of:
type: string
format: date-time
data:
type: object
method:
type: object
request_id:
type: string
stale:
type: boolean
sources:
type: array
items:
type: string
notice:
type: string
key_id:
type: string
signature:
type: string
description: Ed25519 over RFC 8785 canonical JSON of {as_of, data, method, request_id}
signature_info:
type: string
example:
data:
most_organic_payers:
- host: api.example.com
organic_payers_30d: 412
grade: A
'402':
description: Payment required (x402 v2, USDC on Base or Solana)
servers:
- url: https://api.annalist.dev
/v1/checks/changes:
get:
operationId: checks_changes
tags:
- Checks
summary: 'What changed in x402 listings: which services changed prices, endpoints or…'
description: 'What changed in x402 service listings, from daily snapshots of Coinbase''s Bazaar: price raises and cuts, endpoints added and dropped, new and departed services, and payout-wallet changes (worth checking before paying: a hijacked listing looks the same as a rotated wallet). Market-wide for the last 1 to 7 days, or one service''s 30-day change log with host=. Signed.'
x-price: $0.01
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.010000'
protocols:
- x402: {}
parameters:
- name: host
in: query
required: false
schema:
type: string
description: 'optional: one service by host name or URL'
- name: days
in: query
required: false
schema:
type: string
description: 'how many days back: 1 to 7 market-wide, up to 30 for one service (default 7)'
responses:
'200':
description: Signed data
content:
application/json:
schema:
type: object
required:
- as_of
- data
- signature
properties:
as_of:
type: string
format: date-time
data:
type: object
method:
type: object
request_id:
type: string
stale:
type: boolean
sources:
type: array
items:
type: string
notice:
type: string
key_id:
type: string
signature:
type: string
description: Ed25519 over RFC 8785 canonical JSON of {as_of, data, method, request_id}
signature_info:
type: string
example:
data:
days:
- date: '2026-10-13'
price_changes:
count: 6
raised: 4
lowered: 2
services_new:
count: 31
payout_wallet_changes:
services: 0
'402':
description: Payment required (x402 v2, USDC on Base or Solana)
servers:
- url: https://api.annalist.dev
x-refined-from:
- annalist-dev-openapi.json
- openapi.json