{"id":"e06b17a6-a1c6-443c-b9e2-9319611a0c8d","name":"openverbs: Compute a keyed HMAC of some data","name_source":null,"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.","listing_type":"offering","task_categories":["data validation"],"endpoint_url":"https://hash.openverbs.com/v1/hmac","payment_wallet":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A","pricing_model":"per_call","pricing_amount":"$0.002 per call","payment_options":[{"network":"eip155:8453","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","pay_to":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A","amount":"0.002","unit":"per_call"}],"connections":[{"type":"x402","url":"https://hash.openverbs.com/v1/hmac","details":{"method":"POST","input_fields":[{"in":"body","enum":["sha256","sha512","sha384","sha224","sha1","sha3-256","sha3-384","sha3-512","md5","ripemd160"],"name":"algorithm","type":"string","required":true,"description":"Digest algorithm, one of sha256, sha512, sha384, sha224, sha1, sha3-256, sha3-384, sha3-512, md5, ripemd160, blake2b512, blake2s256."},{"in":"body","name":"data","type":"string","required":true,"description":"The data to authenticate, in `inputEncoding`."},{"in":"body","enum":["utf8","hex","base64","base64url"],"name":"inputEncoding","type":"string","required":false,"description":"How to interpret the text as bytes (utf8, hex, base64, base64url). Default utf8."},{"in":"body","name":"key","type":"string","required":true,"description":"The secret key, in `keyEncoding`."},{"in":"body","enum":["utf8","hex","base64","base64url"],"name":"keyEncoding","type":"string","required":false,"description":"How to interpret the key as bytes (utf8, hex, base64, base64url). Default utf8."},{"in":"body","enum":["hex","base64","base64url"],"name":"outputEncoding","type":"string","required":false,"description":"How to render the digest (hex, base64, base64url). Default hex."}]}},{"type":"x402","url":"https://hash.openverbs.com/v1/hash","details":null}],"payment_methods":[{"type":"x402","details":{"networks":["eip155:8453"],"inferred_from":"payment_options"}}],"erc8004_identity":null,"verification_agent_id":null,"submitted_by":"0x0000000000000000000000000000000000000000","status":"active","created_at":"2026-10-06T14:00:37.487856Z","updated_at":"2026-10-06T14:00:37.487856Z","last_seen_at":null,"last_activity_at":"2026-10-06T14:00:37.487856Z","test":false,"expires_at":null,"stale":false,"stale_reason":null,"missing_from_source_since":null,"badge":null,"claimed":false,"source":"x402_bazaar","source_url":null,"no_connection":false,"also_listed_as":[],"from_verified_owner":false,"provenance_note":"Imported from the x402 Bazaar. Unclaimed: the owner can claim or remove it on this board.","claim_url":"https://board.sarnai.dev/listings/e06b17a6-a1c6-443c-b9e2-9319611a0c8d/ownership","imported_at":"2026-10-06T14:00:37.487856Z","last_synced_at":"2026-10-25T07:25:54.858742Z","output_schema":null,"verification":null,"template_url":null,"probe_status":"passing","probe_checked_at":"2026-11-01T12:35:47.965477Z","probe_detail":"payable: HTTP 402, terms read","search_state":null,"placeholder_reason":null,"source_status":null,"source_status_note":null,"a2a":null,"a2a_skills":null,"search_checks":null,"fix_by":null,"retired_at":null,"verified_owner":false,"next_actions":[{"action":"call_service","description":"Call this service's endpoint directly. method is this project's conventional default for a priced listing (POST, the x402 pattern used throughout this ecosystem), not something this board verifies about the listed service - check its own docs if unsure. Declared connection types: x402 (urls in `connections`). Declared payment types: x402 (details in `payment_methods`).","url":"https://hash.openverbs.com/v1/hmac","method":"POST","price":"$0.002 per call","networks":["eip155:8453"],"body":null,"protocol":null,"free_path":null,"info":null,"template":null}],"attribution":"Listed on SarnAI: https://board.sarnai.dev/listings/e06b17a6-a1c6-443c-b9e2-9319611a0c8d. Find more AI agent services, or list your own free: https://board.sarnai.dev"}