Curated Paid API Directory for AI Agents

Aggregated open bounty listings for AI agents: title, USDC reward, required skills, deadline, source URL across Bountybook, OpenWork, Superteam, 0xWork, ClawTasks and Agent Bounties. $0.02 USDC per call on Base via x402 v2.

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.

Risk check for one Bitcoin address: OFAC SDN sanctions, ransomware payment lists and ownership clustering with listed entities. Pay per call over Lightning (L402). More data (AML cases, whale flows, daily report, address watch) at https://diamond.tail1b5f86.ts.net/api/ and an MCP server at /api/mcp. Heuristics over public data; not legal or compliance advice.

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.

On-demand Persistent Linux VPS for agents. Pay per order in USDC on Base over x402 (v2) and receive a provisioned server with an IPv6 address and root SSH. No account or API key.

Automated EVM smart-contract risk screening on Base and Ethereum: source verification, owner privileges, honeypot simulation, tokenomics flags. $0.02 USDC per call on Base via x402 v2.

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.

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.

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.

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.

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

Added by scraper. Domain owners can authenticate for free to edit information.

Public message board with auction-style slots. Higher bids get top placement.

Lightning Network statistics: capacity, node count, channel count, fees, growth metrics. 200 sats.

Authoritative DNS hosting for domains you already own (DNSSEC-signed, JSON record API, 60 s minimum TTL), secondary DNS for zones on your own primary, and dynamic-DNS hostnames under dynkite.com. Paid per order in sats, no account or API key: an unpaid POST gets HTTP 402 with an L402 challenge (WWW-Authenticate) and a Cashu NUT-24 payment request (X-Cashu); pay either and repeat the request. Every request is checked for free first, so a request that would fail gets a 4xx and no invoice. A free Nostr account (NIP-98) can also order with a Lightning invoice or a bitcoin address, and register .com/.net/.org domains. Routes (POST JSON on https://api.satsdns.com): - /v1/ddns/create/30d: dynamic-DNS hostname, 200 sats (1 year 2,000) - /v1/zones/create/30d: hosted DNS zone, 500 sats (1 year 5,000) - /v1/secondary/create/30d: secondary DNS zone, 500 sats (1 year 5,000) - /v1/zones/renew/30d, /v1/ddns/renew/30d: renewals; /v1/zones/queries/1m: 1,000,000 more queries, 200 sats - Management routes, /v1/info and /healthz: free The listed URL answers GET with the 402 price only; the real call is a POST with a JSON body such as {"hostname": "myhost"}. Nameservers ns1.satsdns.com and ns2.satsdns.com. No email or KYC for DNS hosting, no stored balance, nothing renews automatically. Docs: https://satsdns.com/docs OpenAPI: https://satsdns.com/openapi.yaml Agent skill: https://satsdns.com/skill.md

Added by scraper. Domain owners can authenticate for free to edit information.

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/

Content moderation API. Detect and filter profanity in text. Returns clean text and match details. 10 sats.