P0 Agent Economy Index Knowledge API
The Knowledge API from P0 Agent Economy Index — 1 operation(s) for knowledge.
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OpenAPI Specification
openapi: 3.2.0
info:
title: P0 Agent Economy Index Knowledge API
version: 0.2.0
x-logo:
url: https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/icon.png
contact:
name: dev Mike (P0)
email: chebotarev.mike@gmail.com
url: https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/join
description: 'An open index of the machine-to-machine (agent) economy. x402 routes: ranked discovery over the live x402 service market, every indexed service scored by real 30-day calls and paying-wallet bounds, with a receipt naming the snapshot hash and scoring revision. /economy routes, for Tempo MPP, Virtuals ACP, Olas, Masumi, ERC-8004 agent registries, Solana agent registries, Base agent contracts and MCP servers (Official MCP Registry): each protocol''s published figures (agent or server counts, transactions or payment events; payers and USD volume only where the source publishes them: payers for x402 and Tempo MPP, USD volume for x402 and Virtuals ACP), each with its unit, window and source; units differ, so totals are not summed. L402 and per-service MPP listings are not covered.'
x-guidance: 'Market data over 25897 listed x402 services, 30-day window. For protocols beyond x402 (Tempo MPP, Virtuals ACP, Olas, Masumi, ERC-8004 agent registries, Solana agent registries, Base agent contracts and MCP servers (Official MCP Registry)) use /economy, /economy/protocols and /economy/search. For x402, start with GET /search?q=<capability> for ranked services, or /top for the highest-demand ones with callsPerPayer (near 1 means each payer bought once, high means repeat use). /price benchmarks what comparable services charge, /networks breaks demand down by chain, /tags is the capability vocabulary, /count is the market totals, /service looks one service up by URL, /report and /alpha are the category report and the underserved niches, /dataset is the full export. Premium: /dataset/pro ($25) is the enriched full export (demand rank overall and within the top tag, per-seller and per-category aggregates) and /report/weekly ($5) the market report; /dataset/teaser is a free 5% sample in the /dataset/pro row schema. EVERY paid route answers a call with no parameters at all with real data rather than an error, so a blind purchase is never wasted. If you transferred the price to payTo in USDC, USDT or DAI on Base without a payment header, just call the route again within 30 minutes and it serves the data (one transfer, one response); other transfers are never matched automatically: claim them with ?tx=<hash> (on /pay/check use ?payment_tx=<hash> instead, since its tx is the transaction being checked) on Base, Ethereum, Arbitrum or Polygon (USDC, USDT, DAI, WETH, cbBTC, WBTC, USDT0 where that chain has the token, or native ETH/POL), ?btc=<txid> (BTC), ?sol=<signature> (SOL, USDC, USDT), ?tron=<txid> (TRX, USDT TRC-20) or ?stx=<txid> (STX, sBTC); a direct transfer on any other chain, or of a token not named here, cannot be claimed. The two premium routes are the exception and serve a plain transfer only when it is claimed with ?tx=<hash>. /sample, /health and /dataset/teaser are free. Payment is x402 v2, scheme exact, networks eip155:8453, eip155:42161, eip155:137 (USDC); stacks:1 (sBTC); eip155:43114, eip155:10, eip155:42220 (USDC via UltravioletaDAO); eip155:42161 (USDT0), eip155:1 (USDC) via UltravioletaDAO, or MPP (method evm, intent charge, USDC on EVM networks, same prices); a plain transfer on Base, Ethereum, Arbitrum or Polygon also works via ?tx=<hash>.'
servers:
- url: https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev
tags:
- name: Knowledge
paths:
/knowledge/search:
get:
summary: Use when you need knowledge search for facts about a topic, person, place…
operationId: knowledge_search
parameters:
- name: q
in: query
required: true
description: 'search query: a topic, name or question'
schema:
type: string
minLength: 2
maxLength: 200
example: bitcoin
- name: limit
in: query
required: false
description: number of articles
schema:
type: integer
minimum: 1
maximum: 10
default: 5
example: 5
- name: lang
in: query
required: false
description: Wikipedia language edition
schema:
type: string
default: en
enum:
- en
- de
- fr
- es
- it
- pt
- ru
- ja
- zh
- pl
- nl
- uk
- ar
- fa
- sv
- ko
- id
- tr
- vi
- he
- cs
- fi
- 'no'
- hu
- ro
example: en
security:
- x402: []
- mpp: []
x-payment-info:
protocols:
- x402: {}
- mpp:
method: evm
intent: charge
currency: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
network: eip155:8453
networks: eip155:8453, eip155:42161, eip155:137 (USDC); stacks:1 (sBTC); eip155:43114, eip155:10, eip155:42220 (USDC via UltravioletaDAO); eip155:42161 (USDT0), eip155:1 (USDC) via UltravioletaDAO
asset: USDC
price:
mode: fixed
currency: USD
amount: '0.001'
alternatives:
- assets: USDC, USDT, DAI, ETH, WETH, cbBTC, WBTC
networks: Base, Ethereum, Polygon, Arbitrum
address: '0xECa891e34b3E5873181Fb779672564E198C55354'
- assets: BTC
networks: Bitcoin
address: bc1qqwgyyqv6raq2jnghals2n2aujgwd4e9p64g4hr
- assets: SOL, USDC, USDT
networks: Solana
address: FTbVqWwsfJJ5AuAwNDuCuzdpwCEJahu14HAUgAYcJHuq
- assets: STX, sBTC
networks: Stacks
address: SP34GH04YTB01AMXF4CAQ10Y5B7G4E0119N99W986
- assets: TRX, USDT (TRC20)
networks: TRON
address: TB9rHqT8yLxwdsWCb3zN2nvjc8wLhsUdaQ
responses:
'200':
description: ok
content:
application/json:
schema:
$schema: https://json-schema.org/draft/2020-12/schema
type: object
required:
- query
- lang
- count
- results
- source
- attribution
- note
properties:
query:
type: string
lang:
type: string
count:
type: number
results:
type: array
items:
type: object
properties:
rank:
type: number
title:
type: string
description:
type: string
descriptionSource:
type: string
extract:
type: string
url:
type: string
historyUrl:
type: string
pageId:
type: number
lastRevisionId:
type: number
lastTouched:
type: string
wikidataId:
type: string
wikidataUrl:
type: string
license:
type: string
licenseUrl:
type: string
attribution:
type: string
source:
type: object
properties:
name:
type: string
api:
type: string
fetchedAt:
type: string
cached:
type: boolean
attribution:
type: object
properties:
text:
type: string
license:
type: string
licenseUrl:
type: string
changes:
type: string
wikidataLicense:
type: string
wikidataLicenseUrl:
type: string
note:
type: string
example:
query: bitcoin
lang: en
count: 1
results:
- rank: 1
title: Bitcoin
description: Decentralized digital cryptocurrency
descriptionSource: wikipedia
extract: 'Bitcoin (abbreviation: BTC; sign: ₿) is the first decentralized cryptocurrency. Based on a free-market ideology, bitcoin was invented in 2008 when an unknown person published a white paper under the pseudonym of Satoshi Nakamoto.'
url: https://en.wikipedia.org/wiki/Bitcoin
historyUrl: https://en.wikipedia.org/w/index.php?curid=28249265&action=history
pageId: 28249265
lastRevisionId: 1378636617
lastTouched: '2026-10-05T18:54:53Z'
wikidataId: Q131723
wikidataUrl: https://www.wikidata.org/wiki/Q131723
license: CC BY-SA 4.0
licenseUrl: https://creativecommons.org/licenses/by-sa/4.0/
attribution: '"Bitcoin" from Wikipedia (en), https://en.wikipedia.org/wiki/Bitcoin, by its contributors, CC BY-SA 4.0'
source:
name: Wikipedia (en)
api: https://en.wikipedia.org/w/api.php
fetchedAt: '2026-10-06T10:12:30.000Z'
cached: false
attribution:
text: 'Text from Wikipedia, the free encyclopedia, by its contributors (authors: see each result''s historyUrl), licensed under CC BY-SA 4.0; reuse of these extracts must keep the same licence and credit. Wikidata IDs are CC0. P0 is not affiliated with or endorsed by the Wikimedia Foundation.'
license: CC BY-SA 4.0
licenseUrl: https://creativecommons.org/licenses/by-sa/4.0/
changes: Plain-text extract of the lead section (first 3 sentences, at most 1200 characters); formatting, links and references removed.
wikidataLicense: CC0 1.0
wikidataLicenseUrl: https://creativecommons.org/publicdomain/zero/1.0/
note: Encyclopedic search over Wikipedia articles (not a general web search engine). Results are ranked by Wikipedia's own search. Check the linked article for current details.
'402':
description: x402 v2 payment required; nothing is charged when the input is refused
tags:
- Knowledge
components:
securitySchemes:
x402:
type: apiKey
in: header
name: PAYMENT-SIGNATURE
description: x402 v2 payment signature; the 402 response tells how
mpp:
type: http
scheme: Payment
description: 'MPP (Machine Payments Protocol) credential, method evm, intent charge: the 402 WWW-Authenticate: Payment challenge tells how'
x-discovery:
protocols:
- x402
- mpp
network: eip155:8453
networks: eip155:8453, eip155:42161, eip155:137 (USDC); stacks:1 (sBTC); eip155:43114, eip155:10, eip155:42220 (USDC via UltravioletaDAO); eip155:42161 (USDT0), eip155:1 (USDC) via UltravioletaDAO
payTo: '0xECa891e34b3E5873181Fb779672564E198C55354'