{"openapi":"3.1.0","info":{"title":"Hash Toolkit","version":"0.1.0","description":"Cryptographic digests and HMACs — SHA-2, SHA-3, BLAKE2, SHA-1, MD5, RIPEMD-160 — with hex/base64 I/O.","x-guidance":"Cryptographic digests and HMACs — SHA-2, SHA-3, BLAKE2, SHA-1, MD5, RIPEMD-160 — with hex/base64 I/O. Each operation is an HTTP POST to its /v1/<operation> path with a JSON request body (see each operation's requestBody schema) and returns a JSON response. Endpoints are paid per successful call via x402 or MPP (USDC on Base); an unpaid request returns 402 with payment metadata in the WWW-Authenticate header.","contact":{"email":"hello@openverbs.com"}},"x-discovery":{"ownershipProofs":["0xb1401a71756f51464a9962db12f1eb3e9522490cd20010b06d00cf7b7770acfd5f79721f9dfdf2643f8cecd29af3bde9ec133941a386042b32d9886053a70de61b","0xc1c1f11793e18a00fcb7072421f26e89fb75b6aa517fa84370564991f4b10efa024f6f57e4e67eefd20cf46cc01fc5a62d793fa8fbcda04f26c946a3433d73f91b","0x676b474af0ef9ed4809b5d12d2e789b36e52d56215b21f601d71f76620e36ec630347116a7b2b349a3c3681e5db0fbfa76c4169a676b6d6f27864d0e5017284a1c","0xc2ab96522515ed9e9bc4f1a241b774bd48df42e951ddbf7f6aa8fc76f5a96a20421703e1ec402ce7eb1e4eabea3b6e4e4129cf39d56ea91cf4fcf38561fc94fc1c"]},"servers":[{"url":"https://hash.openverbs.com"}],"paths":{"/health":{"get":{"summary":"Health check","security":[],"responses":{"200":{"description":"Healthy","content":{"application/json":{"schema":{"type":"object","properties":{"ok":{"type":"boolean"},"service":{"type":"string"},"version":{"type":"string"}}}}}}}}},"/v1/hash":{"post":{"summary":"Hash data","description":"Compute a cryptographic digest (SHA-2, SHA-3, BLAKE2, and legacy SHA-1/MD5/RIPEMD-160) of some data. The input may be utf8/hex/base64/base64url and the digest is returned as hex/base64/base64url. Paid endpoint (x402 + MPP). Price: $0.002000 USDC per successful payment.","tags":["hash data","sha256 hash","compute digest","md5 checksum api","sha3 digest","data checksum"],"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"data":{"type":"string","maxLength":5000000,"description":"The data to hash, in `inputEncoding`."},"algorithm":{"type":"string","enum":["sha256","sha512","sha384","sha224","sha1","sha3-256","sha3-384","sha3-512","md5","ripemd160","blake2b512","blake2s256"],"description":"Digest algorithm, one of sha256, sha512, sha384, sha224, sha1, sha3-256, sha3-384, sha3-512, md5, ripemd160, blake2b512, blake2s256."},"inputEncoding":{"type":"string","enum":["utf8","hex","base64","base64url"],"description":"How to interpret the text as bytes (utf8, hex, base64, base64url). Default utf8."},"outputEncoding":{"type":"string","enum":["hex","base64","base64url"],"description":"How to render the digest (hex, base64, base64url). Default hex."}},"required":["data","algorithm"],"additionalProperties":false}}}},"responses":{"200":{"description":"`{ algorithm, hash, outputEncoding }`.","content":{"application/json":{"schema":{"type":"object","description":"`{ algorithm, hash, outputEncoding }`."}}}},"400":{"description":"Invalid request; no payment is attempted"},"402":{"description":"Payment required; x402/MPP metadata returned in headers"},"502":{"description":"Upstream provider error after payment verification"}},"x-payment-info":{"amount":"2000","currency":"0x20c000000000000000000000b9537d11c60e8b50","description":"Compute a cryptographic digest (SHA-2, SHA-3, BLAKE2, and legacy SHA-1/MD5/RIPEMD-160) of some data. 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The input may be utf8/hex/base64/base64url and the digest is returned as hex/base64/base64url.","intent":"charge","method":"evm","recipient":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A"},{"amount":"2000","currency":"0x20c000000000000000000000b9537d11c60e8b50","description":"Compute a cryptographic digest (SHA-2, SHA-3, BLAKE2, and legacy SHA-1/MD5/RIPEMD-160) of some data. The input may be utf8/hex/base64/base64url and the digest is returned as hex/base64/base64url.","intent":"charge","method":"tempo","recipient":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A"}]}}},"/v1/hmac":{"post":{"summary":"HMAC data","description":"Compute a keyed HMAC of some data with a secret key — the standard way to sign and verify webhooks (Stripe, GitHub, etc.) and API requests. Data and key may each be utf8/hex/base64/base64url; the tag is returned as hex/base64/base64url. Paid endpoint (x402 + MPP). Price: $0.002000 USDC per successful payment.","tags":["hmac signature","sign webhook payload","verify webhook hmac","keyed hash api","hmac sha256","api request signature"],"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"data":{"type":"string","maxLength":5000000,"description":"The data to authenticate, in `inputEncoding`."},"key":{"type":"string","minLength":1,"maxLength":16384,"description":"The secret key, in `keyEncoding`."},"algorithm":{"type":"string","enum":["sha256","sha512","sha384","sha224","sha1","sha3-256","sha3-384","sha3-512","md5","ripemd160","blake2b512","blake2s256"],"description":"Digest algorithm, one of sha256, sha512, sha384, sha224, sha1, sha3-256, sha3-384, sha3-512, md5, ripemd160, blake2b512, blake2s256."},"inputEncoding":{"type":"string","enum":["utf8","hex","base64","base64url"],"description":"How to interpret the text as bytes (utf8, hex, base64, base64url). Default utf8."},"keyEncoding":{"type":"string","enum":["utf8","hex","base64","base64url"],"description":"How to interpret the key as bytes (utf8, hex, base64, base64url). Default utf8."},"outputEncoding":{"type":"string","enum":["hex","base64","base64url"],"description":"How to render the digest (hex, base64, base64url). Default hex."}},"required":["data","key","algorithm"],"additionalProperties":false}}}},"responses":{"200":{"description":"`{ algorithm, hmac, outputEncoding }`.","content":{"application/json":{"schema":{"type":"object","description":"`{ algorithm, hmac, outputEncoding }`."}}}},"400":{"description":"Invalid request; no payment is attempted"},"402":{"description":"Payment required; x402/MPP metadata returned in headers"},"502":{"description":"Upstream provider error after payment verification"}},"x-payment-info":{"amount":"2000","currency":"0x20c000000000000000000000b9537d11c60e8b50","description":"Compute a keyed HMAC of some data with a secret key — the standard way to sign and verify webhooks (Stripe, GitHub, etc.) and API requests. 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