API Marketplace
137 settlement-verified APIs of 154 live, 1113 endpoints in total. AI agents discover via MCP and pay per request in USDC on Base. Like the browsable grid, this list shows settlement-verified listings only. Selected verified listings:
- ot-intel-api: 40 endpoints. OT/ICS IOC enrichment. Paid sample matched public OTX pulse count and ASN. Did not invent a campaign. $0.01 GET /ot/ioc. Higher routes unverified.. $0.01 per request.
- The Clinic: 1 endpoints. One line of encouragement plus an id you can quote back. Entertainment, not a fact check. GET /v1/line $0.001 USDC on Base. The same line is free at /v1/hug; the fee buys the id an. $0.001 per request.
- LLM2API - Gemma 4 12B + Crypto Trade Checks: 3 endpoints. OpenAI-compatible Gemma 4 12B chat completions plus crypto pre-trade checks (news risk-check, liquidity size-check) powered by the live Kurage FreqAI trading system.. $0.05 per request.
- PHION Evidence Engine: 3 endpoints. Fetches a public URL, hashes the bytes, and returns a signed observation. Not a guarantee about the site. POST /v1/paid/fetch-evidence $0.004 USDC on Base. Paid body may report HTT. $0.004 per request.
- PennyAPI Local Business & Places Search: 1 endpoints. Real-time local business and places search for AI agents. Find restaurants, stores, services, and nearby businesses with structured addresses, coordinates, ratings, phone numbers, . $0.004 per request.
- DELTA Witness: 1 endpoints. Preflight an autonomous action before taking it: fetches a public URL, compares the live observation against deterministic expectations you supply, and returns a safe/unsafe verdic. $0.03 per request.
- Flat-rate LLM and EVM toolkit: 48 endpoints. 48 pay-per-call endpoints, no API key and no account: EVM chain reads, ERC20 safety checks, URL to markdown, email and domain checks over live DNS, hashing, randomness, time zones . $0.005 per request.
- zFinia Accessibility Contrast Calculator: 1 endpoints. Calculate WCAG 2.x sRGB contrast for one caller-supplied colour pair; no interface-wide accessibility claim is made. POST {"foreground":"#000000","background":"#ffffff","large_text. $0.001 per request.
- EUCompliance.tools: 33 endpoints. 40 MCP tools for EU compliance, invoice validation, read-only chain and market evidence, and AI inference. 10 free tools; paid results include signed receipts. USDC per call via x4. $0.001-$1 per request.
- API Acre: 61 endpoints. 61 account-free x402 v2 APIs for deterministic code, document, web, public-record and Base data tasks, with OpenAPI, MCP, A2A and exact USDC pricing.. $0.001-$0.25 per request.
- Agent402.Tools: 1 endpoints. Pay-per-call tools for agents. Prices and catalog size come from https://agent402.tools/api/pricing and can change.. $0.001-$3.3 per request.
- CSV Drift Evidence: 1 endpoints. Detect pipeline and schema drift by comparing baseline and candidate CSVs for added, removed or reordered columns, type changes, missing-rate shifts and optional numeric excursions. $0.015 per request.
- LaborPulse: 1 endpoints. US labor-market signal in one call: jobs, unemployment, wage growth and JOLTS distilled into a single read. Straight from the BLS.. $0.05 per request.
- Skim - Clean Reader API: 4 endpoints. x402-native clean reader for AI agents. POST a URL, get back agent-ready Markdown plus structured metadata (title, byline, published date, word count) in well under a second. Pay p. $0.002-$0.02 per request.
- Yahoo Finance Stock Data & Historical Prices API: 1 endpoints. Stock quotes, OHLCV chart history, previous close, 52-week range, exchange and currency metadata for ticker research. Deterministic test: symbol=AAPL&range=1mo&interval=1d. Values . $0.01 per request.
- Sitemap URL Extractor & XML Sitemap Parser API: 1 endpoints. Extract URLs from XML sitemaps and sitemap indexes for SEO audits, migrations, crawl planning, and RAG ingestion. Supports nested sitemap discovery with bounded results and private. $0.01 per request.
- Postcode & Address Lookup API: 5 endpoints. UK postcode to address, validation, autocomplete, geocoding. $0.001 per request.
- DNS & Domain Intelligence API: 5 endpoints. WHOIS, DNS A/AAAA/MX/TXT, SPF/DKIM, nameserver history. $0.002 per request.
Live listings that we have not paid for yet are not hidden, only unselected by default: browse every live listing, verified and not.