Pricing — Trust Layer

What does a proof look like?

Each proof is a cryptographic receipt with 3 independent witnesses. Here is a real one.

proof output

{ "proof_id": "prf_20260303_161853_4d0904", "spec_version": "2.0", "hashes": { "chain": "sha256:e1a88d6b...", // tamper-proof seal "request": "sha256:bf6a5be7...", "response": "sha256:4f702d8e..." }, "arkforge_signature": "ed25519:soR6HtvN...", // Ed25519 origin proof "payment_evidence": { // verified Stripe receipt "receipt_content_hash": "sha256:960c68c8...", "parsing_status": "success", "parsed_fields": { "amount": 1.0, "currency": "eur" } }, "verification_url": "https://arkforge.tech/trust/v1/proof/prf_..." }

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Enter your email. Get an API key instantly. No credit card, no confirmation email.

Send a request

Call POST /trust/v1/proxy with your target API. ArkForge forwards it and creates the proof.

Verify anytime

Each proof has a public URL. Verify the SHA-256 hash, Ed25519 signature, and timestamp independently.

terminal

$ curl -X POST https://arkforge.tech/trust/v1/proxy \ -H "X-Api-Key: YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{"target": "https://api.example.com/v1/run", "method": "POST", "payload": {"task": "translate", "text": "hello"}}'

Frequently asked questions

What is a "proof"?

A proof is a cryptographic receipt for an API call. It records what was sent, what was returned, and when — signed by ArkForge, timestamped by an independent authority, and logged in a public transparency ledger.

Is there a long-term commitment?

No. The Free plan is commitment-free. Pro and Enterprise are monthly subscriptions, cancellable at any time. Overage billing is strictly opt-in with a configurable cap (5–100 EUR).

What happens if I exceed my monthly quota?

By default, requests beyond the quota are rejected with HTTP 429. If you enable opt-in overage, additional proofs are billed at 0.01 EUR/proof (Pro) or 0.005 EUR/proof (Enterprise), up to your configured cap.

Can I upgrade from Free to Pro?

Yes, visit the Pro signup page to activate your subscription.

What does each proof include?

Every proof includes a SHA-256 fingerprint and three output formats: JSON API response, HTTP headers, and a public HTML verification page. All plans include 3 independent witnesses: Ed25519 signature, RFC 3161 timestamp, and a Sigstore Rekor transparency log entry. Optionally, attach a Stripe receipt URL as a 4th witness.

What is the difference between Free and Pro proofs?

The cryptographic content is identical. Pro offers 10× more proofs per month (5,000 vs 500), access to opt-in overage, and a monthly SLA. Enterprise offers 100× the volume and a lower overage rate (0.005 EUR/proof).

Do your timestamps have legal evidential value?

All plans use RFC 3161 timestamps issued by WebTrust-certified TSA providers (FreeTSA, DigiCert, Sectigo). These timestamps carry evidential weight in many jurisdictions. They do not constitute a qualified electronic timestamp under eIDAS Regulation (Article 42). For use in formal legal proceedings, consult a qualified lawyer. Contact us for a use-case assessment.

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