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Supports stripe, github, vercel, cdp, slack, and generic HMAC-SHA256. Constant-time compare, clock-skew tolerance on timestamp-bearing providers (Stripe / Slack / CDP). Stateless — caller supplies their secret in the request body, we never store it.","extensions":{"bazaar":{"category":"utility","discoverable":true,"info":{"input":{"body":{"payload":"{\"id\":\"evt_test\",\"type\":\"checkout.session.completed\"}","provider":"stripe","secret":"whsec_test_secret","signature":"t=1640000000,v1=abc...","timestamp":"1640000000","toleranceSeconds":300},"bodyType":"json","method":"POST","type":"http"},"output":{"example":{"details":{"ageSeconds":14,"checkedTolerance":true},"ok":true,"payment":{"network":"eip155:8453","payer":"0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb","transaction":"0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"},"provider":"stripe","scheme":"hmac-sha256-stripe","valid":true},"type":"json"}},"schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"properties":{"payload":{"type":"string"},"provider":{"enum":["stripe","github","vercel","cdp","slack","generic"],"type":"string"},"secret":{"type":"string"},"signature":{"type":"string"},"timestamp":{"type":"string"},"toleranceSeconds":{"type":"number"}},"required":["provider","payload","signature","secret"],"type":"object"},"bodyType":{"enum":["json"],"type":"string"},"method":{"enum":["POST"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"tags":["webhook","hmac","signature","verify","agent-dev"]}},"lastUpdated":"2026-10-26T08:21:48.572Z","quality":{"l30DaysTotalCalls":4,"l30DaysUniquePayers":2,"lastCalledAt":"2026-10-26T08:21:48.38Z"},"resource":"https://app.heinrichstech.com/v1/cdp/webhook-sig-verify","type":"http","x402Version":2},"source":"x402_bazaar","summary":"BitBooth Webhook Signature Verify: pay 0.005 USDC, verify a webhook signature against the provider's canonical HMAC scheme. 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