Instant weather data by city name — no API keys, no geocoding setup, no rate limits. Current conditions and daily forecasts for any city worldwide in structured JSON, ready for agent consumption.

Multi-source aggregated FX Best Bid/Ask from multiple institutional LPs. 62-88% tighter spreads than any single source. Real-time tick data with quality metadata. AI agent API for forex trading, portfolio dashboards, price comparison.

Screenshot and PDF capture of any URL — no browser infrastructure needed, no server costs. Pay per capture.

BuildPulse — home construction and renovation intelligence: project cost estimates, contractor vetting, permit requirements, material pricing, ROI projections, and inspection checklists. Global coverage — jurisdiction-aware permits, codes, and costs (US and Canada deepest; UK/AU equivalents handled).

Automotive intelligence API — 11 endpoints powered by NHTSA, EPA, and live market data. Safety recalls, reliability analysis, DIY repair guides, vehicle comparison, market value, EV break-even, dealer negotiation, pre-purchase inspection, parts pricing, total cost of ownership, and car-financing/APR intelligence. Global recall data (NHTSA, DVSA UK, Transport Canada, ACCC AU, RAPEX EU) and globa...

Global fitness intelligence API. Evidence-based workout programming, nutrition science, supplement efficacy analysis, injury recovery protocols, race training plans, sleep optimization, plateau-breaking strategies, and physical rehabilitation. All content grounded in current sports science research. Serves athletes and fitness enthusiasts worldwide — supports any language via ?lang=. Pricing: $...

Global pet health and care intelligence API. AI-synthesized veterinary symptom triage, breed selection guides, pet nutrition analysis, medication safety (drug interactions, toxin exposure), senior pet care, travel preparation, insurance comparison, and cost estimation. Backed by current veterinary literature via real-time search. Serves pet owners, veterinary clinics, and pet-focused AI agents ...

Satellite NDVI, soil intelligence, yield forecasts, pest alerts, irrigation scheduling, and commodity outlooks for any crop, any location, globally. x402 micropayment API for growers, traders, and AI agents.

Global meal planning and culinary intelligence API. AI-synthesized meal plans, recipe generation, dietary restriction guidance, grocery optimization, pantry utilization, batch cooking, food budgeting, cooking substitutions, leftover transformation, and kitchen equipment recommendations. Supports every major diet (Mediterranean, keto, vegan, Ayurvedic, Japanese, halal, kosher, diabetic-friendly,...

Global energy grid intelligence API. NREL + EIA + Open-Meteo data synthesis. Home solar feasibility, electricity rate analysis, time-of-use optimization, EV charging cost modeling, battery storage ROI, renewable energy comparison, natural gas pricing, and community solar enrollment guidance. Covers all 50 US states with expanding international coverage (EU, AU, CA). EnergySage solar quotes, Jac...

AI-synthesized insurance intelligence. Auto coverage analysis, life insurance needs calculator, homeowners gap finder, annual coverage review, and renters insurance guidance. All endpoints require x402 payment (USDC on Base mainnet) via the PAYMENT-SIGNATURE header.

68 pay-per-query intelligence APIs (733 endpoints) your AI agent can call and pay for autonomously — USDC on Base + Solana via the x402 protocol. No accounts, no API keys, no subscriptions.

Pay-per-send email delivery. No API keys, no accounts.

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Paid, attributable, perishable observation of public web facts. witness is an independent oracle: it observes one stated fact (e.g. a page rank) and returns a signed observation. Quote-first — run POST /quote with {url, extract, assertion, replicas:1} (free). Do not POST empty. A 200 means the experiment can be performed; only then pay POST /witness twice with the same body ($0.02 USDC via x402...

Convert a list of texts into QR code PNG images in one request via the Bulk QR Code Generator API for AI (via X402).

ApiToll runs pay-per-call data + content agents on x402 (USDC on Base). This service exposes a real-time EVM gas snapshot across 17 chains (Ethereum, Base, Optimism, Arbitrum, Polygon, Avalanche, BSC, Gnosis, Fantom, Linea, Scroll, Blast, Mode, opBNB, Celo, zkSync, Mantle) — pick a chain with ?chain=<id>, get slow/standard/fast tiers + base fee. Paid per call, no subscription, no API keys.

SQL read/write on shared agent memory — prepaid sessions or per-query x402. Omitted from default shard OpenAPI (jobs/agents/d1); use GET /v1/models?bundle=memory.

The agent-native short-rate benchmark. Live on Base mainnet. Pay-per-call data + bilateral RFQ marketplace + Chainlink-driven liquidations.

QR code generation.

Chart rendering proxy backed by chartsplat.

URL shortener for character-limited contexts.

Publish markdown as a hosted HTML page.

Standard endpoint health check with extended verification

Verify any text data using the Cybercentry Private Data Verification API with x402 payment protocol. Returns Zero-Knowledge Proof (ZKP) verification details.

Scan a deployed smart contract using Cybercentry. Supported chains: mainnet, base, poly, arbi, optimism, avax, bsc, gnosis, zkevm, blast. Returns job_id, overall_risk, status. $0.02 per scan

A compact x402 utility surface for agents that need cheap, repeatable non-LLM transformations before spending on heavier routes: CSV cleanup, JSON Schema checks, timestamp conversion, JWT decode, URL normalization, hashes, codecs, and text utilities.

AgentMail gives AI agents real email inboxes. Create, send, receive, and search messages via REST API — built for autonomous agents and agentic workflows.

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A chain-agnostic protocol for web payments

Accept x402 crypto payments on 29 chains — or hand your AI agent a wallet to pay on its own. One line, USDC/USDT/native straight to your wallet. No backend, no fee, MIT.

REP web application

Real-time and historical Seoul weather data from Korea Meteorological Administration (KMA). Pay $0.01 USDC on Base Mainnet per request. Ideal for travel apps, tourism services, and anyone visiting Seoul.

ThoughtProof — Verification infrastructure for autonomous AI. Three products: Sentinel, PLV, and Reasoning Verification. Pay per call, no minimums.

Real people start taking action for your product. Up in minutes, and your first campaign is free. ProductClank gives builders distribution instead of asking for capital.

x402-paid HTTP API on Base (eip155:8453) and Solana mainnet — full cW* transport lineup. GRU hub routes (chain 138, mainnet, Alltra) are documented at /.well-known/x402-gru.json

ApexScout helps buyer agents inspect x402 payment requirements, diagnose compatibility failures, and decide whether a route is ready before any buyer-controlled payment. Paid routes return HTTP 402 before payment and one JSON result after a settled HTTP 200. No automatic spend, custody, or platform endorsement is claimed.

Scan OpenClaw SKILL.md files for malware, prompt injection, and 37 other threat patterns. x402-native, no API keys.

Score any website against the Vercel Agent Readability Spec and llmstxt.org standard. Get actionable fixes to make your site AI-agent friendly.

Wallet intelligence designed for crypto. Get wallet profiles with DeFi portfolio data, onchain metadata, socials, and labels. Formo is the analytics and data platform designed for DeFi.

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Pay-per-call property-records API for Cook County, Illinois — including the City of Chicago. Look up any property by street ADDRESS or 14-digit PIN and get parcel details, recorded sales & deed history, building permits, and property-tax assessment history, joined and normalized into one answer. Returns finished, joined answers the raw county open-data APIs can't: building permits LINKED to the...

PDF rendering API for agents and pipelines. Accessible, archive-grade PDFs from Markdown or template DSL — PDF/A-2A + PDF/UA-1 compliant, about a second per render.

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A chain-agnostic protocol for web payments

Check live status and redirects for up to 10 URLs in one call. via the HTTP Status Code Checker API for AI (via X402).

BuildPulse — home construction and renovation intelligence: project cost estimates, contractor vetting, permit requirements, material pricing, ROI projections, and…

ApiToll runs pay-per-call data + content agents on x402 (USDC on Base). This service exposes a real-time Base mainnet gas snapshot — slow/standard/fast EIP-1559 fee tiers, current base fee, head block, and recent fullness — backed by a direct eth_feeHistory RPC call. Paid per call, no subscription, no API keys.

Global energy grid intelligence API. NREL + EIA + Open-Meteo data synthesis. Home solar feasibility, electricity rate analysis, time-of-use optimization, EV charging…

Global fitness intelligence API. Evidence-based workout programming, nutrition science, supplement efficacy analysis, injury recovery protocols, race training plans,…

M2M100 translate — customer revenue SKU on Workers AI NLP.

Check whether a service is up and which parts are affected. Basic status summaries are free. Detailed status reports and recent change history cost USDC through x402 v2; no API key or signup is needed. The API guidance below explains what's included. See /.well-known/agent.json and /.well-known/x402 for current prices and supported payment networks.

Changelog State API watches release notes and changelogs for 40 monitored vendors and projects, including Anthropic, OpenAI, Stripe, GitHub, Chrome and more, and detects breaking changes as they ship. Free coarse fleet status; structured release and change history are paid per call over x402 (USDC on Base). OpenAPI spec at /openapi.json, agent guide at /llms.txt.

Source-cited ECB foreign-exchange reference conversion with explicit cross-rate math. Underlying ECB statistics are available free; the fee covers validation, calculation, and machine-ready delivery.

HTTP compatibility surface for the same deterministic, evidence-linked premises-licence decision engine exposed over MCP. Free readiness/status routes remain unmetered; POST /api/v1/preflight and /api/v1/compare are x402 protected.

Evidence-linked England taxi/private-hire licensing preflight and comparison MCP for AI agents.

Popdot AI rents your idle domains to AI agents by the hour. You keep full ownership and earn passive income with zero maintenance. Listing is free.

One street address in: a source-backed picture of a Gold Coast or Brisbane property and what surrounds it.

Paid, machine-verifiable capture and preflight checks for public web sources.