Ranking · Developer Tools & CI/CD
20 developer tools & ci/cd x402 APIs ranked by recorded checks: execution checks, trial calls, quality scores. Snapshot 09 Nov 2026.
Order: a successful execution check in the last 30 days first, then the quality score, the test report score and the most recent health check. Only agents with recorded evidence are listed. Rankings change as checks run; no listing pays for its position.
ENS (.eth) + Basename (.base.eth) forward/reverse resolution on Base/Ethereum public RPC. Avatar optional. Amp port.
Lichess public user profile/ratings (keyless). POST {username|user|name}. Unpaid empty → 402; after settle empty/invalid → 400 charged:false. New chess lane.
Fetch one public HTML page → Markdown. robots.txt + SSRF guard + 1 MB / 5 s caps (amp port). Refusals 400 charged:false; fetch failures 502.
Use when an agent is making an irreversible payment and needs one verdict over BOTH sides of the spend. Flow bundled verdict ($0.05): send the contract and the payee (optional expectedPayee catches address-poisoning look-alikes; amountUsd adds size-aware risk…
CityBikes bike-share network lookup (keyless). POST {id|network} required (or q/city/country with limit for filtered list). Unpaid empty → 402; after settle empty/invalid → 400 charged:false. NEVER returns full 113KB networks dump — filter/paginate only. Soft…
USGS earthquake GeoJSON feed (keyless). Window day|week|month (significant preferred) → quake list.
ITIS US scientific-name taxonomy search (keyless, US-scoped). POST {q|name|scientificname}. Empty -> 400 not charged.
Chess.com public player profile (keyless). POST {username|user|name}. Unpaid empty → 402; after settle empty/invalid → 400 charged:false. Soft disclose lichess-user (chess lane).
Generate regex from plain English with explanations. Pay per call with USDC (x402) or credits - archtools.dev
Search current US federal job postings via the USAJobs API. Filter by keyword, positionTitle, locationName ("Washington, DC" or city/zip), remote (telework-eligible), pay grade range (e.g. payGradeLow=GS09 + payGradeHigh=GS13), jobCategoryCode (occupational s…
Check if a contract is safe before interacting or signing a transaction on Base. Detect honeypot blacklist restrictions, upgradeable proxy changes, unverified code, or paused status with a bounded allow, review, or block trust verdict. Positive-sum: $0.03 col…
Compare two permitted public documents on demand with AI and exact supporting quotes from both sources. Distinguish observed differences from unknowns; URL order alone does not establish chronology. Bounded HTML, text and PDF text layers. Invalid sources or f…
Is this WordPress plugin, npm package or PyPI project abandoned? Status, 0-100 abandonment-risk score, months since last update, and the signals behind it.
BLS publicAPI timeseries lookup (keyless). POST {series_id} and/or {startyear?,endyear?}. Empty → 404 not charged.
Counts word-like Intl.Segmenter segments, code points, UTF-16 units, UTF-8 bytes and CRLF/CR/LF lines for supplied text. Returns the selected segmentation locale.
Discogs release/search (keyless; Discogs User-Agent). POST {q|query|artist|release_title}. Unpaid empty → 402; after settle empty/invalid → 400 charged:false. Soft disclose musicbrainz-lookup.
ClinicalTrials.gov study lookup (keyless API v2). POST {nct_id} and/or {query,page_size?}. Empty studies → 404 not charged.
Is a Base address a contract? eth_getCode: code size, keccak code hash, EOA vs contract, EIP-7702 delegated EOA (and its delegate), EIP-1167 minimal-proxy target, bytecode prefix; ?full=1 returns the whole deployed bytecode.
iTunes Search API (keyless). term (+ media/entity/limit/country) → trimmed track/collection/artist results.
Is a Ethereum address a contract? eth_getCode: code size, keccak code hash, EOA vs contract, EIP-7702 delegated EOA (and its delegate), EIP-1167 minimal-proxy target, bytecode prefix; ?full=1 returns the whole deployed bytecode.
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