{"openapi":"3.1.0","info":{"title":"2s — the (most) everything API","version":"1","summary":"The (most) everything API.","description":"The (most) everything API for AI agents: 575+ pay-per-call endpoints on one origin. More live, ground-truth data than any other x402 service — public records, finance & SEC filings, crypto & web3, security & CVEs, legal, medical, weather, geocoding, and B2B/EDI. A full AI gateway: chat, image, and multi-model consensus across every major model, priced per request in the 402 before you pay. And agent infrastructure with no account: wallet-scoped storage (kv/docs/vectors/files), locks, queues, scheduled callbacks, pub/sub, and watchers that push signed webhooks when the world changes. Pay per call in USDC on Base or Solana via x402 — no API keys, no signup, no subscription. The first x402 API with upto billing: on AI endpoints, authorize the quoted max and settle only your actual usage. Try before you buy: add ?trial=1 (or header X-2s-Trial: 1) to any endpoint for one free real call per endpoint per hour — no wallet needed. New endpoints land constantly.","contact":{"name":"2s","url":"https://2s.io","email":"alley@2s.io"},"x-logo":{"url":"https://2s.io/icon-512.png","altText":"2s"},"x-guidance":"Pay-per-call REST API for AI agents — hundreds of endpoints returning ground-truth data (US public records, company & legal identifiers, finance/SEC, crypto/web3, security & CVEs, medical codes, weather & geocoding, agriculture, energy, maritime, music, and more). Every endpoint is paid per call in USDC via x402 (Base or Solana) — no API key, no signup. Call any endpoint with no auth to get a 402 PaymentRequirements envelope, sign it (EIP-3009 on Base, partial SPL transfer on Solana), and retry with the PAYMENT-SIGNATURE header. Add ?trial=1 for one free real call per endpoint per hour to test before paying. To discover the right endpoint: GET https://2s.io/api/directory for the full catalog, or GET https://2s.io/api/search/endpoints?q=<natural-language task> for a ranked match. Per-call price is on each operation as x-payment-info (from $0.001). Batch up to 50 calls behind one payment via POST https://2s.io/api/batch/run."},"servers":[{"url":"https://2s.io"}],"components":{"responses":{"BadRequest":{"description":"Bad request — invalid parameters."},"PaymentRequired":{"description":"Payment required. Body contains the x402 PaymentRequirements envelope with a multi-network accepts array; the per-call price is in accepts[].amount (and on the operation as x-2s-price). Sign for whichever rail you hold USDC on (EIP-3009 for Base, partial SPL transfer for Solana) and retry with the PAYMENT-SIGNATURE header (X-PAYMENT also accepted for v1 clients).","content":{"application/json":{"schema":{"$ref":"#/components/schemas/X402PaymentRequiredV2"}}}},"MethodNotAllowed":{"description":"Method not allowed — see `Allow` header for the supported method."},"ServerError":{"description":"Internal server error."},"UpstreamError":{"description":"Upstream provider error."}},"parameters":{"TrialMode":{"name":"trial","in":"query","required":false,"description":"Try before you buy. Set to 1 for one free real call per endpoint per hour — no wallet or payment needed — to verify the endpoint before paying. Equivalent to sending the \"X-2s-Trial: 1\" request header. Works on every endpoint.","schema":{"type":"integer","enum":[1]}}},"securitySchemes":{"x402Payment":{"type":"apiKey","in":"header","name":"PAYMENT-SIGNATURE","description":"x402 protocol v2: base64-encoded PaymentPayload. Call any paid endpoint without auth to receive a 402 with a multi-network PaymentRequirements envelope. Sign for either rail: EIP-3009 transferWithAuthorization (Base USDC) OR a partial SPL token transfer (Solana USDC). Retry with PAYMENT-SIGNATURE header. X-PAYMENT is also accepted for v1 buyer clients. See https://x402.org."}},"schemas":{"Source":{"type":"object","description":"Provenance of the data: upstream provider, source URL, and license.","properties":{"provider":{"type":"string","description":"Upstream data provider."},"url":{"type":"string","description":"Source URL or documentation link."},"license":{"type":"string","description":"License / usage terms for the data."}}},"CallMeta":{"type":"object","description":"Per-call meta envelope — endpoint id, cost, caller kind, settlement details."},"X402PaymentRequiredV2":{"type":"object","description":"x402 v2 PaymentRequired envelope. Pick any entry from accepts[], sign for that rail, retry with the PAYMENT-SIGNATURE header.","required":["x402Version","accepts"],"properties":{"x402Version":{"type":"integer","const":2},"error":{"type":"string","description":"Human-readable reason payment is required."},"resource":{"type":"string","description":"The resource URL being purchased."},"accepts":{"type":"array","description":"Payment requirement options, one per supported network (Base USDC, Solana USDC).","items":{"type":"object","required":["scheme","network","amount","asset","payTo","maxTimeoutSeconds"],"properties":{"scheme":{"type":"string","enum":["exact"]},"network":{"type":"string","description":"CAIP-2 network id, e.g. \"eip155:8453\" (Base) or \"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp\"."},"amount":{"type":"string","description":"Price in atomic asset units (USDC has 6 decimals)."},"asset":{"type":"string","description":"Asset contract address / mint."},"payTo":{"type":"string","description":"Treasury address to pay."},"maxTimeoutSeconds":{"type":"integer"},"extra":{"type":"object","description":"Rail-specific extras (EVM: EIP-712 domain name/version; Solana: feePayer).","additionalProperties":true}}}},"extensions":{"type":"object","description":"Optional discovery metadata (e.g. bazaar input/output schemas).","additionalProperties":true}}}}},"paths":{"/api/pubsub/create-topic":{"post":{"tags":["pubsub"],"summary":"PUBSUB: create a topic you own, scoped to YOUR wallet.","description":"PUBSUB: create a topic you own, scoped to YOUR wallet. Returns a topicId — share it so other agents can pubsub.subscribe; only you (the owner) can pubsub.publish to it. The coordination backbone for multi-agent systems. Idempotent per name (re-creating returns the same id and extends its 90-day life). No account or API key — pay per call with x402.","operationId":"pubsub_create-topic","deprecated":false,"security":[{"x402Payment":[]}],"responses":{"200":{"description":"Normalized: items = [the topic].","content":{"application/json":{"schema":{"type":"object","required":["data","meta"],"properties":{"data":{"type":"object","properties":{"ok":{"type":"boolean","enum":[true]},"items":{"type":"array","items":{"type":"object","properties":{"topicId":{"type":"string"},"name":{"type":"string"}},"required":["topicId","name"],"additionalProperties":false}},"total":{"type":"integer","nullable":true,"description":"Total matching rows upstream; null when unknown."},"source":{"$ref":"#/components/schemas/Source"}},"required":["ok","items","total","source"],"additionalProperties":false},"meta":{"$ref":"#/components/schemas/CallMeta"}}}}}},"400":{"$ref":"#/components/responses/BadRequest"},"402":{"$ref":"#/components/responses/PaymentRequired"},"405":{"$ref":"#/components/responses/MethodNotAllowed"},"500":{"$ref":"#/components/responses/ServerError"},"502":{"$ref":"#/components/responses/UpstreamError"}},"x-2s-id":"pubsub.create-topic","x-2s-version":null,"x-2s-price":{"usd":0.005},"x-2s-accepts":["x402"],"x-2s-response-shape":"normalized","x-payment-info":{"price":{"mode":"fixed","currency":"USD","amount":"0.005000"},"protocols":[{"x402":{}}]},"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"name":{"type":"string","description":"Topic name, 1-64 chars of [A-Za-z0-9._:-]. e.g. \"price-alerts\"."}},"required":["name"],"additionalProperties":false}}}},"parameters":[{"$ref":"#/components/parameters/TrialMode"}]}},"/api/pubsub/publish":{"post":{"tags":["pubsub"],"summary":"PUBSUB: publish a message to a topic YOU own, fanning out a...","description":"PUBSUB: publish a message to a topic YOU own, fanning out a signed callback to every CONFIRMED subscriber. Returns the number of subscribers it was delivered to. Only the topic owner (the x402 payer who created it) can publish. Message is arbitrary JSON (≤64 KB). Priced by confirmed-subscriber count (a small base + per subscriber), so you pay for the fan-out you request. Delivery is at-least-once with retry + signature.","operationId":"pubsub_publish","deprecated":false,"security":[{"x402Payment":[]}],"responses":{"200":{"description":"Normalized: items = [{ delivered }] — subscriber count fanned to.","content":{"application/json":{"schema":{"type":"object","required":["data","meta"],"properties":{"data":{"type":"object","properties":{"ok":{"type":"boolean","enum":[true]},"items":{"type":"array","items":{"type":"object","properties":{"topicId":{"type":"string"},"delivered":{"type":"number"}},"required":["topicId","delivered"],"additionalProperties":false}},"total":{"type":"integer","nullable":true,"description":"Total matching rows upstream; null when unknown."},"source":{"$ref":"#/components/schemas/Source"}},"required":["ok","items","total","source"],"additionalProperties":false},"meta":{"$ref":"#/components/schemas/CallMeta"}}}}}},"400":{"$ref":"#/components/responses/BadRequest"},"402":{"$ref":"#/components/responses/PaymentRequired"},"405":{"$ref":"#/components/responses/MethodNotAllowed"},"500":{"$ref":"#/components/responses/ServerError"},"502":{"$ref":"#/components/responses/UpstreamError"}},"x-2s-id":"pubsub.publish","x-2s-version":null,"x-2s-price":{"usd":0.005},"x-2s-accepts":["x402"],"x-2s-response-shape":"normalized","x-payment-info":{"price":{"mode":"dynamic","currency":"USD","min":"0.005000","max":"50.000000"},"protocols":[{"x402":{}}]},"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"topicId":{"type":"string","description":"The topic you own (from pubsub.create-topic)."},"message":{"description":"The payload to fan out — any JSON, up to 64 KB."}},"required":["topicId"],"additionalProperties":false}}}},"parameters":[{"$ref":"#/components/parameters/TrialMode"}]}},"/api/pubsub/subscribe":{"post":{"tags":["pubsub"],"summary":"PUBSUB: subscribe a callbackUrl to a topic by its topicId...","description":"PUBSUB: subscribe a callbackUrl to a topic by its topicId (the topic can belong to any wallet — you just need the id). CONFIRMATION REQUIRED: we immediately POST a one-time challenge to your callbackUrl with header X-2s-Confirmation-Token (and {type:\"2s_subscription_confirmation\", token} in the JSON body); to be CONFIRMED your endpoint must reply 2xx with the response body set to exactly that token, or JSON {\"token\":\"<token>\"}. Only confirmed subscribers receive published messages (this prevents subscribing a non-consenting URL). Response field \"confirmed\" tells you if it worked; re-call to retry. When the owner publishes, we POST the message to your callbackUrl, EIP-191-signed (verify with X-2s-Signature) and retried with backoff; a subscriber that repeatedly fails delivery is auto-disabled. Returns a subscriptionId for pubsub.unsubscribe. Up to 100 subscribers per topic, one per URL. Pay per call with x402.","operationId":"pubsub_subscribe","deprecated":false,"security":[{"x402Payment":[]}],"responses":{"200":{"description":"Normalized: items = [the subscription]. confirmed=false means your URL did not echo the challenge token; fix it and re-call.","content":{"application/json":{"schema":{"type":"object","required":["data","meta"],"properties":{"data":{"type":"object","properties":{"ok":{"type":"boolean","enum":[true]},"items":{"type":"array","items":{"type":"object","properties":{"subscriptionId":{"type":"string"},"confirmed":{"type":"boolean"},"callbackSigner":{"type":"string"}},"required":["subscriptionId","confirmed","callbackSigner"],"additionalProperties":false}},"total":{"type":"integer","nullable":true,"description":"Total matching rows upstream; null when unknown."},"source":{"$ref":"#/components/schemas/Source"}},"required":["ok","items","total","source"],"additionalProperties":false},"meta":{"$ref":"#/components/schemas/CallMeta"}}}}}},"400":{"$ref":"#/components/responses/BadRequest"},"402":{"$ref":"#/components/responses/PaymentRequired"},"405":{"$ref":"#/components/responses/MethodNotAllowed"},"500":{"$ref":"#/components/responses/ServerError"},"502":{"$ref":"#/components/responses/UpstreamError"}},"x-2s-id":"pubsub.subscribe","x-2s-version":null,"x-2s-price":{"usd":0.005},"x-2s-accepts":["x402"],"x-2s-response-shape":"normalized","x-payment-info":{"price":{"mode":"fixed","currency":"USD","amount":"0.005000"},"protocols":[{"x402":{}}]},"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"topicId":{"type":"string","description":"The topicId to subscribe to (from pubsub.create-topic)."},"callbackUrl":{"type":"string","format":"uri","maxLength":2048,"description":"Where we POST published messages. Any http(s) URL; must echo the confirmation token to activate; body is signed."},"label":{"type":"string","maxLength":64,"description":"Optional free-text tag."}},"required":["topicId","callbackUrl"],"additionalProperties":false}}}},"parameters":[{"$ref":"#/components/parameters/TrialMode"}]}},"/api/pubsub/unsubscribe":{"post":{"tags":["pubsub"],"summary":"PUBSUB: remove one of YOUR subscriptions by its...","description":"PUBSUB: remove one of YOUR subscriptions by its subscriptionId — you stop receiving that topic's messages. Returns removed:false if it isn't yours or is already gone. Private to your wallet (the x402 payer).","operationId":"pubsub_unsubscribe","deprecated":false,"security":[{"x402Payment":[]}],"responses":{"200":{"description":"Normalized: items = [the unsubscribe result].","content":{"application/json":{"schema":{"type":"object","required":["data","meta"],"properties":{"data":{"type":"object","properties":{"ok":{"type":"boolean","enum":[true]},"items":{"type":"array","items":{"type":"object","properties":{"subscriptionId":{"type":"string"},"removed":{"type":"boolean"}},"required":["subscriptionId","removed"],"additionalProperties":false}},"total":{"type":"integer","nullable":true,"description":"Total matching rows upstream; null when unknown."},"source":{"$ref":"#/components/schemas/Source"}},"required":["ok","items","total","source"],"additionalProperties":false},"meta":{"$ref":"#/components/schemas/CallMeta"}}}}}},"400":{"$ref":"#/components/responses/BadRequest"},"402":{"$ref":"#/components/responses/PaymentRequired"},"405":{"$ref":"#/components/responses/MethodNotAllowed"},"500":{"$ref":"#/components/responses/ServerError"},"502":{"$ref":"#/components/responses/UpstreamError"}},"x-2s-id":"pubsub.unsubscribe","x-2s-version":null,"x-2s-price":{"usd":0.005},"x-2s-accepts":["x402"],"x-2s-response-shape":"normalized","x-payment-info":{"price":{"mode":"fixed","currency":"USD","amount":"0.005000"},"protocols":[{"x402":{}}]},"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"subscriptionId":{"type":"string","description":"The subscriptionId from pubsub.subscribe."}},"required":["subscriptionId"],"additionalProperties":false}}}},"parameters":[{"$ref":"#/components/parameters/TrialMode"}]}}}}