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curated paid API directory for AI agents

₿ satring --list

Curated Paid API Directory for AI Agents

Discover paid APIs for your AI agents, via Lightning and USDC

cat> [all] [ai/ml] [data] [finance] [identity] [media] [search] [social] [storage] [tools]

filter> [all] [verified] [confirmed] [live] [down] [unknown]

proto> [all] [L402] [x402] [MPP]

sort> [popular] [newest] [top-rated] [cheapest] [most-reviewed]

L402 Text Transformer

[L402] [live] 5 sats/per-request [-----] (0)

l402-text-transformer-2

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.

Satsback Agent API

[verified] [L402] [live] 21 sats/one-time [-----] (0)

satsback-agent-api

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.

#tools #finance

[verified] [L402+MPP] [live] 21 sats/per-request [-----] (0)

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

clankfeed events

[verified] [L402+MPP] [live] 21 sats/per-request [-----] (0)

clankfeed-events

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/

Ollama LLM Inference (L402)

[L402] [live] 5 sats/per-request [-----] (0)

ollama-llm-inference-l402

Pay-per-request LLM inference via Lightning micropayments. Supports llama3 (5 sats) and qwen2.5:14b (15 sats). Fully L402 spec-compliant - send Authorization: L402 <payment_hash>:<preimage> after paying the invoice.

Satring Bulk Export

[verified] [L402+x402+MPP] [live] 5000 sats/per-request [-----] (0)

satring-bulk-export

Export the full service directory as JSON in a single request. Paywalled (5000 sats / $2.50 USDC). Supports L402 and x402.

Satring Directory API

[verified] [L402+x402+MPP] [live] 100 sats/free [*****] (1)

satring-directory-api

L402 + x402 paid API directory. GET for paginated listing with category/protocol filters, detail by slug, and search. POST to submit new services (1000 sats / $0.50 USDC). PATCH to edit with token.

[L402] [live] 10 sats/per-request [-----] (0)

L402-native MCP server for AI agents. 5 Bitcoin/Lightning tools: BTC price, fee send-decision, Lightning Address resolver, TX decoder, and optimal send window. Pay 10-25 sats per call. No API keys. Live at mcp.loopxxi.com/mcp

#tools #finance

[L402] [live] 100 sats/per-request [-----] (0)

Post and fix jobs, earn Bitcoin. Post jobs and bounties for fixing community issues via L402-protected API. Pay sats to create job postings — the reward goes to whoever fixes the issue. Supports location-based posts, AI-powered fix verification, and Nostr cross-posting.

Lightning Faucet Memory Bank

[L402] [live] 5 sats/per-request [*****] (1)

lightning-faucet-memory-bank

Persistent key-value storage for AI agents. Store, retrieve, query, delete data. 5-50 sats per op.

Lightning Faucet Keyword Extraction

[L402] [live] 30 sats/per-request [*****] (1)

lightning-faucet-keyword-extraction

Extract keywords and key phrases from text. Returns ranked keywords with relevance scores. 30 sats.

Lightning Faucet Timestamp

[L402] [live] 10 sats/per-request [*****] (1)

lightning-faucet-timestamp

Trusted high-precision timestamp with current Bitcoin block height. 10 sats.

Lightning Faucet Profanity Filter

[L402] [live] 10 sats/per-request [*****] (1)

lightning-faucet-profanity-filter

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

Lightning Faucet UUID Generator

[L402] [live] 5 sats/per-request [*****] (1)

lightning-faucet-uuid-generator

Generate UUID v7 identifiers. 5 sats per UUID.

api.lightningenable.com/l402/proxy/youtube-transcript

[L402+MPP] [live] 5 sats/per-request [-----] (0)

api-lightningenable-com-l402-proxy-youtube-transcript

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

Lightning Faucet LNURL Metadata

[L402] [live] 30 sats/per-request [*****] (1)

lightning-faucet-lnurl-metadata

Resolve and parse LNURL endpoints. Returns metadata, min/max amounts, supported features. 30 sats.

Lightning Faucet Headers Echo

[L402] [live] 5 sats/per-request [*****] (1)

lightning-faucet-headers-echo

Echo your HTTP request headers back. Useful for debugging proxies, auth, and request inspection. 5 sats.

Lightning Faucet Entropy

[L402] [live] 5 sats/per-request [*****] (1)

lightning-faucet-entropy

Cryptographic random entropy via Lightning. Get up to 1024 bytes of secure random data. 5-10 sats.

Lightning Faucet Joke

[L402] [live] 21 sats/per-request [*****] (1)

lightning-faucet-joke

AI-generated joke.

Kevros Governance Attest

[L402+x402+MPP] [live] 30 sats/per-request [-----] (0)

governance-taskhawktech-com-governance-attest

Tamper-evident audit trail for AI agents. Every action hash-chained into an append-only ledger with ML-DSA-87 (FIPS 204) on-chain plus SLH-DSA-256f (FIPS 205) witness-lane post-quantum block signatures. Independently verifiable. $0.02 per attestation. Current Lightning sats price is published by the live L402 challenge. US customers only pending export classification.

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