Verify.et API

This portable skill applies to backend integrations in Node.js, Python, PHP, Go, Java, Ruby, .NET, Rust, and mobile apps that proxy through a trusted backend.

Core Workflow

1. Identify the integration surface: backend REST adapter, checkout/payment verification, webhook receiver, polling/SSE status UI, dashboard/reporting usage, or framework-specific wrapper.
2. Load only the references needed:

• references/api-endpoints.md for auth, endpoints, payloads, responses, permissions, and status flow.
• references/bank-specs.md for explicit bank payloads and universal-router disambiguators.
• references/error-codes.md for HTTP failures, verification error codes, retry decisions, credits, quotas, and idempotency conflicts.
• patterns/integration-methods.md for choosing sync, queued, webhook, polling, or SSE flows.
• patterns/webhooks.md for receiver security, signatures, retries, payloads, and test-webhook debugging.
• debugging/common-mistakes.md for production anti-patterns.
• debugging/production-checklist.md for pre-launch validation.

1. Inspect the user's code before changing it. Find where API keys are stored, where POST /api/verify is called, how 202 is handled, whether duplicate submissions are possible, and whether Verify.et calls run server-side.
2. Keep Verify.et API keys server-side. Browser and mobile clients should call the user's backend, not Verify.et directly.
3. Prefer one small server-side Verify.et client/adapter over scattered raw fetch calls.
4. Send an Idempotency-Key for payment and checkout attempts, and persist the returned Verify.et requestId.
5. Treat 200 as an inline terminal response and 202 as queued work. For 202, store requestId, then poll GET /api/verify/:requestId, open SSE for interactive UIs, or rely on webhooks for server-to-server fulfillment.
6. Treat confirmationHistory.confirmedBefore === true as a repeat-confirmation signal. Do not fulfill blindly without applying the product's duplicate-payment policy.
7. Add focused tests at the user's boundary: request builder tests, webhook signature tests, polling tests, idempotency conflict tests, and error mapping tests.

Integration Decisions

• Use POST /api/verify?waitMs=... only as a best-effort convenience. Production workflows must still work when Verify.et returns 202.
• Use webhooks when the backend must learn the result even if the browser or mobile app closes.
• Use polling when the client needs a simple pending-status screen.
• Use SSE when an authenticated web UI needs lower-latency updates without frequent polling.
• Use both webhooks and polling/SSE for robust checkout UX: webhook updates server truth; polling/SSE updates the visible user flow.
• Use explicit bank payloads when the product already knows the provider. Use universal reference payloads when the UI accepts mixed receipts or links.
• Put irreversible fulfillment behind terminal state checks and duplicate-confirmation policy checks.

Debugging Baseline

Before diagnosing, capture:

• Request method, URL, body shape, headers used, and whether the API key was server-side.
• HTTP status, response body, x-request-id, Retry-After, and X-Verify-Cache.
• Verify.et requestId, processingStatus, status, error.code, and error.retryable.
• Bank/provider, raw receipt/reference, suffix/phone disambiguators, and webhook URL.
• Whether the same checkout attempt reused the same Idempotency-Key.

Security Rules

• Do not place x-api-key values in frontend, mobile app, logs, screenshots, or committed files.
• Do not trust webhook payloads before validating the signature when a signature is present.
• Verify webhook signatures against the raw body, not parsed JSON.
• Make webhook processing idempotent by requestId and/or delivery ID.
• Honor Retry-After for rate limits and temporary unavailability.
• Keep logs useful but redacted: include requestId, bank, status, and error code; omit API keys, cookies, and full authorization headers.

Sources

Use the current public docs when internet access is available:

• https://verify.et/docs/get-started
• https://verify.et/docs/api
• https://verify.et/docs/sdk

If working inside the Verify.et repository, prefer implementation source over stale docs. Relevant source paths are listed in references/api-endpoints.md.