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Every pay-per-call x402 API we can find, ranked by what agents actually pay for. No accounts, no API keys.
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scaudit.madebydevx.comCrypto & DeFiQuick Solidity pre-audit check, $0.90 USDC on Base: send source or a verified contract address + chain; the same automated engine returns the verdict (grade, score, security and owner-trust risk), severity counts, the top 5 findings with location and fix, and owner powers found (mint, pause, blacklist, fees, upgrade). Triage, not a human audit; failed runs not charged. Every finding with code and
Basescaudit.madebydevx.comfrom $0.901 endpoint- Rryanseslow.comImages, audio & video
The RSMAD Sculpture Park as data: placards and preview images for 37 sculptures. The park is free for people to walk. No 3D model files, no license. $0.50 USDC.
Baseryanseslow.comfrom $0.501 endpoint - Rrobotinsight.krSearch & web
Korean robotics industry intelligence, sold per query. Structured feed of Korea/Asia robot-sector news, analysis and KPIs - humanoids, physical AI, robot components (reducers, actuators, MEMS force-torque and tactile sensors), robot semiconductors, defense and logistics robots - written from Korean primary reporting and DART filings that English-language sources do not cover. Filter by date, regio
BasePolygonrobotinsight.krfrom $0.111 endpoint - Rrisk-graph-gx7v4.ondigitalocean.appOther services
Single node — properties + risk grade only (no neighborhood)
Baserisk-graph-gx7v4.ondigitalocean.appfrom $0.051 endpoint - EExende RetryOther services
Execute HTTPS requests reliably with automatic retries for rate limits, temporary server failures, network errors and timeouts. One $0.02 USDC payment creates one durable job with up to 8 attempts and a 24 hour lifetime.
Baseretry.exende.devfrom $0.021 endpoint - RRe:TCG AppraiseCrypto & DeFi
Pokémon card appraisals, $0.02 a call in USDC on Arc, Base, Polygon or Solana. Raw and every PSA/BGS/CGC/SGC grade in 9 currencies, each with source, sample size and dates; set momentum, projections, PnL net of marketplace fees, break-even; EIP-712 signed. No basis, no number.
EVM chain 5042BasePolygon+1retcg.xyzfrom $0.021 endpoint - EExende ResolveImages, audio & video
Exende Resolve turns a public URL into machine-readable web, document, data, text, or image metadata. It detects resource type, extracts static HTML, renders JavaScript pages only when needed, parses PDF text, JSON, CSV and plain text, and returns a normalized result.
Baseresolve.exende.devfrom $0.011 endpoint
Ax3lfloresAI & agentsAPI Rescue - Detect API failures, validate responses against schema or baseline, diagnose causes, and propose code fixes and regression tests in the requested language.
Baserescue.agent.amnt.iofrom $0.031 endpoint- BbananabreadSocial & people
Consumer sentiment for a food, drink, supplement, skincare or beauty product: what shoppers say about it on Amazon, TikTok, Reddit, YouTube, Instagram, Walmart and more, grouped into what they love, wish for and complain about, with verbatim quotes and source links. The response holds the product id and a read_token; the report is ready a few minutes later at GET /v1/products/{id}/consumer-sentime
BasePolygonproduct-api.bananabread.aifrom $0.991 endpoint - IInspect x402 endpointOther services
Fetch any URL and, without paying, decode its x402 402 Payment Required challenge: price (atomic and formatted for known stablecoins), asset, network, payTo, resource, description, timeout and any input schema. Flags MPP and Bazaar discovery extensions. Returns free:true when no payment is needed. SSRF-hardened: public hosts only; private, loopback, link-local and cloud-metadata addresses are reje
Basepreflight.openverbs.comfrom $0.0061 endpoint - TTreasury PreflightCrypto & DeFi
Current USDC and USDT transfer fee in USD per chain, bound to a block number with a validity window.
Basepreflight.admapu.xyzfrom $0.0021 endpoint - Pprediction-bot-iggf.onrender.comSocial & people
Live X (Twitter) sentiment for any Polymarket or Kalshi prediction market. Pass the market question as q; Grok reads the last 3 days of X posts and returns a score from -100 (very bearish on the question) to +100 (very bullish), the one-line catalyst driving the chatter, and whether discussion volume is rising, flat or falling. $0.35 per call.
Baseprediction-bot-iggf.onrender.comfrom $0.351 endpoint - Ppoms-api.canvas-cart.workers.devSearch & web
Full text of one section of the SSA Program Operations Manual System (POMS). Get the id from GET /search?q=<keywords> or GET /part/:code. Use this when you need the complete, verbatim text of a specific POMS section for a disability, retirement, SSI, or Medicare question, not a summary.
Basepoms-api.canvas-cart.workers.devfrom $0.011 endpoint - Ppolymarket-snapshot.x402supply.comCrypto & DeFi
Searches Polymarket prediction markets by text and returns current outcome prices, volume, liquidity, end date and resolution status. Read-only market data, not financial advice.
Basepolymarket-snapshot.x402supply.comfrom $0.0051 endpoint - Ppii-redact.x402supply.comSocial & people
Detect and redact PII in text or JSON. Recognizers are pure pattern/checksum matching (regex + Luhn/mod-97/SSN-area validation) — no LLM calls, no external services. Person names and dates of birth are matched only via nearby context (e.g. 'Mr. Smith', 'DOB: ...'), not general NER, to keep false positives low.
Basepii-redact.x402supply.comfrom $0.021 endpoint - RretracedSocial & people
X (Twitter) account metadata for any handle (based_in, source app, username-change count, recent-activity proxy). Utility endpoint.
Basepay.retraced.sitefrom $0.011 endpoint - BBotonomy Schema AuditSearch & web
Audits the JSON-LD structured data on one public web page: P1 for no schema or missing required properties, P2 for a low rich-result score, each with the properties to add. Call it when a page is missing rich results in Google or before publishing a page that should earn them. Input: url. Returns in seconds. Errors: 400 invalid input, 502 audit failed, 504 timed out. You are not charged for an err
Basepay.botonomy.aifrom $0.051 endpoint - Ccryptoanalysis-track-recordCrypto & DeFi
cryptoanalysis.info hypothetical advisory track record: bounded completed-session history and summary, with the confidence quality statistics. The history ends 7 days before the request's UTC date.
Basepaid-api.cryptoanalysis.workers.devfrom $0.011 endpoint - Ppage-extract.x402supply.comImages, audio & video
Fetches a URL and returns clean article text/markdown plus metadata. Deterministic, static HTML only, no JS rendering.
Basepage-extract.x402supply.comfrom $0.011 endpoint - Oownsite-aeo.logout3login-a74.workers.devOther services
gemm-phi-irisxe-20261013 — q=0.82, evidence=4, expires 2027-04-26
Baseownsite-aeo.logout3login-a74.workers.devfrom $0.501 endpoint - Nnojunk-document.mick8511.workers.devImages, audio & video
NoJunk Document convert: Convert a PDF, Office document, spreadsheet, HTML/XML page or image (by URL or base64) to Markdown with Cloudflare toMarkdown.
Basenojunk-document.mick8511.workers.devfrom $0.011 endpoint - NNFL Team Form 2016-2025Data & research
Use when you need one NFL team's recent form entering a regular-season week: how it played over up to its last 6 games before that week, never that week's game. 44 attributes for offense and defense: passing and rushing yards per play, explosive plays (20+ yard passes, 10+ yard runs), sack, interception and fumble rates, third-down conversion, red-zone TD rate, field position, field goals, time le
Basenfl-form-x402.owenlvll.workers.devfrom $0.101 endpoint - Nnbxs4 Solana Mint EvidenceCrypto & DeFi
Solana SPL Token / Token-2022 mint and extension observations from finalized RPC; unknowns remain unknown. Free preparation returns an immutable report ID; paid read costs 0.01 USDC on Base. Not a sellability or safety verdict.
Basenbxs4.nbx4.devfrom $0.011 endpoint
Cypher ConnectSearch & webSearch verified street dance events worldwide (battles, jams, workshops): up to 50 full records
Basenbdkupglrdfzopydimlt.supabase.cofrom $0.0051 endpoint- Nnatural-date-parse.x402supply.comData & research
Finds every date, time, range and period in text and resolves each to an ISO 8601 value with UTC offset plus a start/end span in an IANA timezone, relative to a reference instant. Reports matched text, index, ambiguity flags and confidence.
Basenatural-date-parse.x402supply.comfrom $0.0051 endpoint - Mmobilitychain.krCrypto & DeFi
Korean mobility and EV supply-chain intelligence, sold per query. Structured feed tracking Korea's automotive-electronics and robotics supply chain - batteries and battery materials, EV components, robot parts, actuators and reducers, semiconductors, and tier-1 suppliers to Hyundai/Kia - written from Korean primary reporting and DART filings English-language sources do not cover. Filter by date, c
BasePolygonmobilitychain.krfrom $0.141 endpoint - Mmercator-entity-evidence.fly.devSocial & people
Evidence-backed company facts and current company information for company enrichment and company verification, with field-level sources, freshness and explicit conflicts.
Basemercator-entity-evidence.fly.devfrom $0.101 endpoint - Mmemory.fluidrack.comOther services
Create namespace
Basememory.fluidrack.comfrom $0.011 endpoint - MMeme GeneratorImages, audio & video
Generate a captioned meme image. Pay per request in USDC on Base mainnet.
Basememegeneratorx402.vercel.appfrom $0.0011 endpoint - Mmelssa.comOther services
The 52 editorial Q&A entries
Basemelssa.comfrom $0.501 endpoint
Service data comes from the Coinbase CDP and PayAI discovery lists and refreshes every few hours. Usage is paid calls over the last 30 days. APIs launched here are verified by us; the rest are paid directly to their owners.