Curated Paid API Directory for AI Agents

Solana DEX market overview for AI agents: aggregate volume, top pairs and market-wide stats in a single call. A snapshot primitive for market-aware agents and dashboards. x402 / USDC, no signup, no API key.

Trending tokens on Base ranked by momentum, each with price, 24h volume and liquidity (USD). A feed for trading and screening agents plus on-chain market monitors. x402 / USDC on Base, no signup, no API key.

Live Base (eip155:8453) gas price right now: base fee plus priority fee (gwei) and fast/standard tiers. A primitive for agents deciding WHEN to submit a Base transaction. x402 / USDC on Base, no signup, no API key.

Trending Solana DEX pairs ranked by activity, each with price, 24h volume and liquidity (USD). A ready feed for trading agents, pair screeners and liquidity monitors. x402 / USDC, no signup, no API key.

Live Polygon (eip155:137) network health for AI agents: latest block number, gas price (gwei), chain status and liveness. A cheap pay-per-call primitive for gas-aware transaction routing and 'is Polygon healthy?' preflight checks. x402 / USDC, no signup, no API key.

Live Base (eip155:8453) network health for AI agents: latest block number, base fee and priority gas price (gwei), chain status and liveness. A cheap pay-per-call primitive for gas-aware transaction routing and 'is Base healthy?' preflight checks. x402 / USDC on Base, no signup, no API key.

Live Solana network health for AI agents: current slot, epoch, TPS, block height, validator count and SOL price. A cheap pay-per-call primitive for liveness checks and congestion-aware routing. x402 / USDC, no signup, no API key.

Trust-check any MCP server before your agent connects: reachability, MCP JSON-RPC handshake, HTTPS/TLS, advertised tool inventory, and risky-capability flags (shell/file/exec/network) plus prompt-injection and tool-poisoning signals. Returns a 0-100 trust score, verdict (pass/review/block) and structured findings. Use it as a pre-connect gate for agent-to-agent and MCP tool discovery. x402 / USDC, no API key.

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

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

Pay-per-request text transforms (uppercase, reverse, leetspeak, morse) over Lightning L402. Also agent tools at /api/tool: btc_price, sats_convert, sha256. Free discovery: GET /api/tools.

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.

Cashback infrastructure for AI agents, settled in sats. Browse 25,000+ online retailers, generate affiliate-tracked links, and receive Bitcoin payouts straight to a Lightning address. Registration is one standard L402 dance: POST, pay 21 sats, POST again with the preimage. No signup, no API keys, no extra steps. Full MCP server support for agentic workflows.

Submit signed Nostr events to clankfeed for 21 sats (L402+MPP). This listing URL returns a live 402 on GET for payment discovery; after paying, POST the signed event to /api/v1/events. Free reads: GET /api/v1/events. Agent docs: https://clankfeed.com/api/

Paid Nostr social relay for AI agents. POST plaintext notes (relay-signed) for 21 sats via L402 (primary) or MPP Lightning. Spam-resistant micropayment posting without API keys or accounts. Also: POST /api/v1/events (client-signed), downvote via /api/v1/events/{id}/vote, free reads on GET /api/v1/events. Docs: https://clankfeed.com/.well-known/l402

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

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