Every agent-payable API.

Cid Bafkreia6nujebdr2tyzvc4ayvtpi5az5dgrtd3scdvf3ehuepa4b2d3hpa — an agent-callable cid bafkreia6nujebdr2tyzvc4ayvtpi5az5dgrtd3scdvf3ehuepa4b2d3hpa service, payable over x402 (USDC on Base). Provided via gateway.grapevine.fyi. Priced around 0.01 USD per call.

0.01 USDC on base-sepolia

0.01 USDC on base-sepolia

0.01 USDC on base-sepolia

0.07 USDC on base-sepolia

Cid Bafkreiepbyzutscnyvbgnmopik4krd7i4yp2pfy7hd75hllf757t32uvc4 — an agent-callable cid bafkreiepbyzutscnyvbgnmopik4krd7i4yp2pfy7hd75hllf757t32uvc4 service, payable over x402 (USDC on Base). Provided via gateway.grapevine.fyi. Priced around 0.1 USD per call.

Cid Bafkreie7xbtpy7flvmlr65se4zv7cprc3rjgfyiufje4rdoxhcuqqhe3q4 — an agent-callable cid bafkreie7xbtpy7flvmlr65se4zv7cprc3rjgfyiufje4rdoxhcuqqhe3q4 service, payable over x402 (USDC on Base). Provided via gateway.grapevine.fyi. Priced around 0.1 USD per call.

0.1 USDC on base-sepolia

0.5 USDC on base-sepolia

Cid Bafkreicuvlxikl6eqkjfw4aegerov6cbepippqpu3caqbalodromkumioe — an agent-callable cid bafkreicuvlxikl6eqkjfw4aegerov6cbepippqpu3caqbalodromkumioe service, payable over x402 (USDC on Base). Provided via gateway.grapevine.fyi. Priced around 1 USD per call.

Live perp funding rates, open interest, and mark/oracle/mid prices across 200+ Hyperliquid perpetuals (free/keyless). Each row: coin, hourly funding rate, open interest, mark/oracle/mid price, premium, prior-day price, 24h notional volume, max leverage. Filter by coin; sort by oi, volume, or funding. On-chain perp microstructure for funding-arb and OI signals.

List the official holidays for a country and year, with exact observed dates including substitute days (e.g. a Saturday July 4th observed on Friday). Query: country (ISO 3166-1 alpha-2, 200+ supported), year, optional region (subdivision code like CA for US-California or BY for DE-Bavaria), optional types filter (public, bank, school, optional, observance — comma-separated), optional lang (ISO 639-1) for localized names. Returns one item per holiday: { date (YYYY-MM-DD), name, type, substitute, rule }. Dates are computed from maintained per-country rules — including movable feasts and lunar-calendar holidays — so they stay correct year over year. Use for scheduling, delivery estimates, payment terms, and SLA math.

Fetch any URL and return its article content with the clutter stripped — nav, ads, sidebars, footers, scripts, styles, comments removed via heuristic extraction (<article> / <main> / role=main / densest block). Choose the output with `format`: markdown (default), text, both (JSON envelope), html (a self-contained readable reader-view page, raw text/html), or pdf (a clean typeset reading document, raw application/pdf). html/pdf are built from the same cleaned content, so they carry no live page, no third-party assets, no trackers. SSRF-guarded, 512KB body cap, 8s timeout, 5 redirects max. JSON formats return { url, finalUrl, title, markdown?, text?, wordCount, sourceBytes }. This uses a raw HTTP fetch (no JavaScript) — for client-rendered / SPA pages whose content only appears after JS runs, use /api/url/render (same formats, headless-rendered). For a pixel-perfect image of the live page use /api/ai/screenshot; to enumerate a page or sitemap into its links use /api/url/map.

Holiday-aware business-day calculator for 200+ countries. Three modes: pass start + addDays (signed integer) to shift a date by N business days; pass start + end to count business days between two dates (exclusive of start, inclusive of end); pass start alone to check one date (is it a business day, which holiday, next/previous business day). Query: country (ISO 3166-1 alpha-2), start (YYYY-MM-DD), optional region (subdivision code), addDays XOR end, optional weekend (comma-separated days, default sat,sun — e.g. fri,sat for the Gulf), optional types (holiday types treated as closures, default public,bank). Skipped holidays are itemized in the response. Use for payment terms, SLA deadlines, and delivery-date math.

Forward geocoding — free-text address or place name → latitude/longitude plus structured address components (houseNumber, road, suburb, city, county, state, postcode, country, countryCode). Query: q (2-500 chars), limit (1-10, default 5), country (optional 2-letter ISO 3166-1 bias). Underlying data is OpenStreetMap (ODbL). Sister: /api/geocode/reverse.

Current spot price and market data for crypto assets. Pass ids as comma-separated CoinGecko asset ids (e.g. bitcoin, ethereum, solana, usd-coin — lowercase id, not ticker symbol; up to 25 per call) and optionally vs (comma-separated fiat/crypto quote currencies, default usd). Returns per-asset price, market cap, 24h volume, and 24h percent change, plus the data timestamp. Live market data past any training cutoff. Price data by CoinGecko.

Verify and search ICD-10-CM diagnosis codes against the official US code set (FY2026, ~98k entries). Pass code (with or without the dot, e.g. E11.9 or E119) to confirm the code exists and list its more-specific child codes, or q to keyword-search code descriptions (e.g. "type 2 diabetes neuropathy"). Optional billable_only=true restricts results to codes valid for claim submission; limit caps results (1-50, default 10). Returns a verified flag, the exact match if any, and matched codes with billable status plus short and long descriptions. Data: CMS/NCHS ICD-10-CM (public domain), refreshed each US fiscal year. Use to confirm diagnosis codes are real and current before placing them in claims, prior authorizations, or clinical documents.

AI web search optimized for agents. Returns ranked results with the relevant extracted content of each page (not just a link + blurb), plus a relevance score. topic=news for recent reporting. Distinct from search.web (raw SERP) — this returns clean, LLM-ready page content per result.

Earnings release calendar — which US-listed companies report earnings in a date window, with expected and (once reported) actual EPS and revenue, and the time of day (before/after market). Pass a from/to window (YYYY-MM-DD; defaults to the next 14 days) and optionally a ticker to filter to one company. Agents cannot recall future earnings dates — this is the schedule. Data by Finnhub.

Latest daily stock quote for a US-listed ticker. Returns the most recent completed trading session: open, high, low, close, volume, VWAP, and trade count, plus the change and percent change versus the prior session, and company reference data (name, primary exchange, security type, currency, market cap). NOTE: this plan tier serves end-of-day / delayed data (the response flags delayed=true), suitable for daily snapshots, fundamentals context, and post-close analysis rather than real-time trading. Pass ticker as a US symbol (e.g. AAPL, MSFT, BRK.B). Market data by Massive (formerly Polygon.io).

Geolocate a single IPv4 or IPv6 address. Returns country (name + ISO code), region (name + code), city, ZIP, lat/lon, timezone, ISP, organization, and AS number + name. For bulk lookups (up to 100 IPs in one call) use /api/ipinfo/bulk instead. Lat/lon precision is city-level, not GPS.

Decode a 17-character VIN to manufacturer-supplied vehicle metadata via NHTSA's vPIC database. Returns identity (year, make, model, trim, series, body class, manufacturer), assembly plant (city, state, country), engine (cylinders, displacement, HP, fuel type, configuration, engine model), transmission (style, speeds), and body/weight specs. Curated to the ~30 fields agents actually use from vPIC's ~140-field response. Backed by NHTSA.gov; data is public-domain US government records.

Convert a value between units of measure: mass (g, kg, mg, lb, oz, t, st), length (m, km, cm, mm, in, ft, yd, mi), volume (l, ml, m3, gal, gal-imp, qt, pt, cup, floz, tbsp, tsp), area (m2, km2, ft2, acre, ha), and temperature (C, F, K). Units are matched case-insensitively with common aliases (kg/kilogram/kgs). Returns {value, from, to, dimension, result}. Exact factors — the ground-truth answer a CPG/ETL pipeline needs instead of an LLM approximating conversions. Cross-dimension conversions (kg→m) return 400.

Decode a 3-character World Manufacturer Identifier (the first three characters of a VIN) to the assigning manufacturer. Returns full manufacturer legal name, common short name, make, vehicle type, and the date NHTSA published the assignment. Useful for partial-VIN analysis — crash reports, damaged-vehicle photos, fleet records — where only the WMI is recoverable. Backed by NHTSA.gov vPIC; data is public-domain US government records.

Look up or search NAICS 2022 industry classification codes (US Census Bureau, public domain). Pass `code` for an exact NAICS code — 2–6 digits or a combined sector like 31-33 — and get its official title, hierarchy path, full official description, activity index terms, and direct child codes. Or pass `query` for free-text search (e.g. 'software publishers', 'coffee shop') over titles plus the official ~20k-entry activity index → ranked candidate codes, optionally filtered by `level` (2=sector … 6=national industry). Ground truth for industry coding in KYC, business registration, government filings, and ERP vendor/customer setup.

8 Things That Tripped Me Up Implementing x402

AABC Base Agent Report

AI chat completions - 80+ models (GPT-4o, Claude, Gemini, DeepSeek), pay per token with USDC

Paid x402 endpoint for multi-model AI voting and decision synthesis.

AI search visibility progress report — Four Layers scoring (SXO/AIO/GEO/AEO), what's working, gaps, and your next 3 highest-impact actions. 1.50 USDC.

AI agent runtime with crypto payments on Solana blockchain

Access to The Little Secret

Access to protected content

Access to protected content

Access to protected resource

Access to protected resource

Access to protected resource

Mainsafe — an agent-callable mainsafe service, payable over x402 (USDC on Base). Provided via pay.lnpay.ai. Priced around 0.1 USD per call.

Agent Economy Brief — an agent-callable agent economy brief service, payable over x402 (USDC on Base). Provided via Apify. Priced around 0.208184 USD per call.

Agent Hub service payment

Agent Hub service payment

Agent Hub service payment

Agent Hub service payment

Agent Hub service payment

Pre-payment risk and usefulness check for AI agents deciding whether to pay an x402 endpoint.

Pay-per-scan AI agent-readability scan. POST { "url": "https://…" } with an X-PAYMENT header to run a scan with no account or subscription. Two tiers: $0.02 (25 pages) and $0.25 (250 pages), USDC on Base.

Multi-source open bounty radar ranked (0.015 USDC). Free 3-item: GET /v0/sample-radar then POST {limit}.

Research outline 0.01 USDC (first pay · Base). Ladder: free GET /v0/sample-outline.json → POST /v0/outline → brief 0.02. Machine settle: GET /first-buy.json · lander /start · /.well-known/x402.

Aggregated x402 ecosystem stats — total services, volume estimates, growth metrics. EXCLUSIVE to httpay.xyz.

Aggregated alpha signals for early opportunities (BSC only). (with AI analysis)