Instant Source Evidence
$0.006 USDC / accepted call
Real search, safe public-HTTPS extraction, timestamped source excerpt and SHA256 content receipt. Perfect for research assistants and quick agent routing.
REQUEST x402 CHALLENGE ↗AGENT-NATIVE × BASE USDC × PROOF BEFORE PAYMENT
STOP BUYING UNVERIFIED ANSWERS.
BUY THE EVIDENCE.
One-call public-web research and source integrity receipts, with an autonomous-agent contract that only settles USDC after an accepted deliverable. No subscription. No new login. No hallucinated citations.
VIEW BUYER PRICING ↓OPEN LIVE MACHINE CONTRACT ↗Truth First. Proof Always. Pay Only for Accepted Delivery.
TWO ENTRY POINTS · NO SUBSCRIPTIONS
Fast, repeatable, auditable.
Source Integrity Bundle
$0.009 USDC / accepted call
Up to three extracted source pages. Requires at least two distinct hosts. Returns source-level hashes plus a recomputable aggregate receipt; fails closed on inadequate evidence.
REQUEST x402 CHALLENGE ↗THE AGENT RETURNS. THE PRICE GETS BETTER.
EFUEL Loyalty — 15% off repeat use
Already hold SML eFuel prepaid credits? Redeem them at a lower effective price through the same protected extraction and evidence receipt pipeline. Existing wallet-bound eFuel balances are the source of truth. No new loyalty token, automatic top-up or arbitrary rewards.
$0.0051 per Rapid accepted call equivalent
Rapid eFuel entry ↗$0.00765 per Multi-source accepted call equivalent
Verified eFuel entry ↗Requires a funded wallet-bound EFUEL API key. Existing ledger atomically burns credits only after an accepted response. Effective USDC values assume the current 100 EFUEL per USDC conversion. Confirm the live EFUEL quote before purchase.
VIEW PREPAID DETAILS ↗READY-TO-RUN CLIENT · NO SPEND BY DEFAULT
Integrate without inventing a wallet flow.
Official x402 v2 client and prepaid EFUEL examples: inspect exact price and payment destination with zero spend; choose --pay only when the customer authorizes a real purchase, or use a funded --efuel key. Both verify accepted content evidence without calling a hash proof a settlement.
THE MACHINE CONTRACT
Integrate directly from your agent.
GET /api/agent-proof/info
GET /api/agent-proof/rapid?q=YOUR_QUERY
GET /api/agent-proof/verified?q=YOUR_QUERY
402 PAYMENT-REQUIRED → payer-controlled authorization
PAYMENT-SIGNATURE → verify → build → accept → settle
PAYMENT-RESPONSE → delivered source evidence
POST /api/agent-proof/verify
{"receipt":{...},"receipt_sha256":"sha256:..."}
Never treat the initial HTTP 402 as a sale. The SHA256 receipt proves content consistency, not that retrieved facts are true. The payer must inspect the settlement response. Prepaid and direct x402 are different payment routes—never both for one call.
LIVE CUSTOMER PATH · NO PRODUCT REPLACEMENT
Already buying SML web data? Upgrade only when you need proof.
The original single-purpose services remain available at their existing prices. The new Agent Proof tiers add source excerpts, freshness and integrity receipts; choose the smallest service that satisfies the job.
Known URL → Markdown
Keep using the existing $0.001 URL-to-Markdown tool for a known public page. No need to pay for full research.
EXISTING EXTRACT CONTRACT ↗Discover + cite real sources
Choose $0.006 Rapid for a source receipt or $0.009 Verified when two different source hosts are required. Funded eFuel users qualify for 15% lower per-use credit cost.
GET PROOF CONTRACT ↗These are distinct tasks and outputs. A SHA256 proof does not establish the factual accuracy of a source. Price authority for any purchase remains the current HTTP 402 challenge on that exact resource.
Built for builders, not vanity listings.
- Hardened source access: public HTTPS, robots checks, bounded body size, SSRF and redirect controls inherited from existing SML extraction
- Real configured search provider, never synthetic results
- Separate no-charge alternatives for unavailable, insufficient or stale evidence
- Free hash verifier; content hashes are not third-party notarization
- Existing low-price Markdown API and research packs stay available
- Compatible with buyer-owned agent payment policies on Base USDC