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Proofwire Email Inbox Provisioning
x402
Proofwire Email Inbox Provisioning is a paid API for AI agents from verify.reversecaptcha.fun, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-20).
Issues a disposable seed email address that an agent can receive mail to, then check for delivery confirmation with SPF/DKIM/DMARC alignment
Price / call$0.001
Success—
StatusUnknown
How this service works
Close the loop on your own work with one paid call that returns a verdict plus Ed25519-signed, falsifiable evidence (verify signatures with GET /v1/keys). GET /v1/verify/http checks a URL is alive (redirect chain, TLS, latency, body hash). GET /v1/verify/dns resolves records and parses SPF/DMARC/DKIM. Email: POST /v1/verify/email/inbox issues a seed address; send mail to it, then GET /v1/verify/email?inbox=&token= returns delivery plus SPF/DKIM/DMARC alignment and raw headers (polls inside the paid window are free). Webhooks: POST /v1/verify/webhook arms a tripwire URL; register it upstream, then poll GET /v1/verify/webhook/{id}?token= for free. GET /v1/verify/page renders a page in a real browser, asserts a selector/text, and returns a screenshot URL. Failed work is never settled.
Output
Returns a JSON object containing: inbox name/ID (e.g. 'check-7f3a1b2c'), a bearer token for subsequent poll calls, the full email address to send mail to (e.g. 'check-7f3a1b2c@inbox.example'), a verdict of 'issued', and an expiry timestamp. The token and inbox ID are used in free follow-up GET /v1/verify/email calls within the paid window to retrieve delivery status, SPF/DKIM/DMARC alignment, and raw headers.
Example use cases
Transactional email deliverability check
“Before I launch my newsletter, provision a seed inbox valid for 24 hours so I can send a test message and confirm it lands with passing SPF, DKIM, and DMARC.”
SMTP pipeline smoke test
“I just reconfigured my SMTP server — can you create a temporary inbox for the next 12 hours so I can fire a test email and prove the whole sending pipeline is working?”
Support inbox for an agent fleet
“My agent needs to verify it can actually deliver email on behalf of users — set up a disposable inbox that lives for 48 hours so it can send to it and check alignment before going live.”
Technical details
Endpoint
POSThttps://verify.reversecaptcha.fun/v1/verify/email/inbox?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need cryptographically attested proof that an email address is reachable and that outbound mail passes SPF/DKIM/DMARC alignment — not just a syntax check. It is the right choice when an AI agent needs to close the loop on its own email-sending work with falsifiable, Ed25519-signed evidence. Prefer it over generic SMTP testers when you need an auditable verdict with signed headers rather than just a delivery log.
Side effects
- ttl_hours exceeds maximum of 72 — request rejected with validation error
- Payment not completed via x402 — 402 response returned, inbox not created
- Service unavailable — inbox provisioning fails, no address issued
- Invalid request body — malformed JSON or unexpected field types returns 400
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| ttl_hours | number |
Output
Schema · Response
{
"type": "json",
"example": {
"inbox": "check-7f3a1b2c",
"token": "inb_...",
"address": "check-7f3a1b2c@inbox.example",
"verdict": "issued",
"expires_at": "2026-01-01T00:00:00Z"
}
}Tags
x402
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