Curated Paid API Directory for AI Agents

Regulatory radar: automated compliance monitoring for agent-run estates.

Unified payment terminal for agent commerce: invoicing, settlement and accounting.

Real-time basket price comparison: track item prices across stores from a single request.

Pay-per-request security vetting for AI agents: deterministic static dossiers of MCP servers and agent endpoints.

Marketplace where AI agents discover and buy pay-per-call services with Bitcoin Lightning. Agents can call listings through L402 without creating an account; sellers keep 95%. Browse the public catalog at https://directory.halmarket.dev and see the integration guide at https://docs.halmarket.dev/#l402. Listing prices vary by service.

Pay-per-call NLP micro-services settled in USDC via x402 on Base mainnet. Live endpoints and prices (verbatim from /.well-known/x402): /v1/sentiment $0.005 - sentiment label+score; /v1/entity-extract $0.004 - people, orgs, places, dates; /v1/summarize $0.008 - condensed summary; /v1/report $0.02 - combined analysis bundle; /v1/batch $0.02 - bulk sentiment. Origin auto-heals: this listing is kept pointed at our live stable origin by an automated keeper (re-pointed within minutes of any rotation). No API keys, no accounts: agents pay per call from self-custody wallets via the x402 402-challenge flow (EIP-3009 USDC transfer on Base). Honest status: zero sales to date.

Buy 2 to 400 Hoodi testnet ETH per order with Base or Solana mainnet USDC through an x402-protected API endpoint.

Cracked is a tool router for AI agents: 13,512 endpoints from 1,248 providers plus 54,000+ Apify actors behind one POST /v1/run, with a measured success rate, median latency and real per-call price for every tool. Live x402 v2 seller on Base (USDC, exact scheme): a bare POST to https://cracked.ai/v1/run answers 402 with the Bazaar discovery extension; 25 resources are listed at https://cracked.ai/.well-known/x402. Price per run is the provider price plus a $0.001 platform fee, quotes never below $0.01, and failed runs are never settled. Docs: https://cracked.ai/docs/x402. Contact: support@cracked.ai.

Buy 1 to 100 Sepolia testnet ETH per order with Base or Solana mainnet USDC through an x402-protected API endpoint.

75 pay-per-call endpoints for AI agents: LLM inference (no API key), SEO/schema/accessibility audits, web scraping & extraction, image generation & vectorization, crypto prices, DNS/geo/email intel, uptime monitoring, exact math/stats/finance, code lint, QR/barcodes, and wallet-owned agent memory. Dual rail: USDC on Base (x402) on every 402; Bitcoin Lightning (L402) when you opt in with the X-Pay-With: l402 header. Catalogs: /.well-known/l402.json and /openapi.json. Human docs + live 2-sat demo: https://l402.webbersites.com

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Metered, OpenAI-compatible multi-model AI inference API. Pay per request in sats via Lightning (L402). 21% discount on Bitcoin payments up to $100.

Purchase a temporary virtual phone number to receive a one-time SMS verification code. Pay-per-use via Lightning. Price varies by country/service.

Upload a PDF or pass a URL and receive an AI-generated summary. No accounts, no API keys. Powered by Claude via Bitcoin Lightning L402. 50 sats per request.

Analyze text sentiment. Returns positive/negative/neutral score with confidence. 30 sats.

Decode BOLT11 Lightning invoices. Returns amount, destination, expiry, description, route hints. 30 sats.

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Records an AI agent's decision declaration and its accountability scope as an external, content-blind entry. The agent self-declares structured facts (enums, counts, timestamps); Decision Anchor stores the declaration and its retention/disclosure policy, never the decision's content, reasoning, or the agent's behavior.

120+ AI services paid with Bitcoin Lightning. Code gen, image generation, voice synthesis, research, translation, legal drafting, medical summaries, SEO analysis, content writing, DevOps automation, data analysis — all pay-per-task via L402. No signup, no subscription, no API keys. From 50 sats. Workflow bundles available.

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