Last updated July 28, 2026
twitr.sh is an x402 service end to end: every one of its 14 X/Twitter tools answers an unpaid request with HTTP 402 and an exact USDC quote, accepts x402 payments on Base and Solana (and MPP on Tempo), and settles each call on-chain. There is nothing to sign up for — the paying wallet is the account, and the 402 challenge doubles as the price list.
Social data demand is bursty and fine-grained — one agent needs 50 tweets about a topic, another needs a week-long monitor on a single account. Subscriptions price for the peak; x402 prices the actual request. Per-item billing with a mandatory resultsLimit means a search for 50 tweets costs about six cents total — and an agent can verify that total in the challenge before signing. Failed calls are never charged, and idempotency keys make retries safe.
Everything a client needs is machine-readable: /.well-known/x402 lists the paid resources, /.well-known/mpp.json covers MPP discovery, /openapi.json is a full OpenAPI 3.1 document with x-payment-info on every endpoint, and /llms.txt + /llms-full.txt serve LLM-ready indexes. MCP clients call POST /api/mcp directly — tools/list free, tools/call gated with a JSON-RPC 402. Start with the docs or browse the tools.
x402 is an open payment protocol that revives the HTTP 402 Payment Required status code for machine payments: a server answers an unpaid request with 402 and a price, the client signs a stablecoin payment authorization and retries, and the server verifies, serves the response, and settles on-chain. It lets APIs charge per request without accounts or API keys.
Yes — twitr.sh exposes 14 X/Twitter tools (reads, search, timelines, bulk extraction, real-time monitors, and write actions) as x402-priced endpoints, paid in USDC on Base or Solana. The same endpoints also accept MPP payments in USDC on Tempo.
Machine discovery lives at /.well-known/x402 and /.well-known/mpp.json, with a full OpenAPI 3.1 spec at /openapi.json carrying x-payment-info blocks per endpoint, an llms.txt index, and an MCP endpoint at POST /api/mcp.
The floor is $0.001. Single reads are about $0.0012, per-item tools bill about $0.0012 per returned item, monitors are ~$0.025 per prepaid hour, and write actions run $0.012–$0.036. The exact quote — including a line-item breakdown — is in every 402 challenge before you sign.