Public APIs
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ArkForge Trust Layer

Security

Cryptographic proof API for HTTP exchanges — Ed25519, RFC 3161, and Sigstore Rekor attestation.

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About ArkForge Trust Layer

ArkForge Trust Layer is a certifying proxy that sits between an AI agent and any API endpoint it calls. Each request and response is hashed and signed with the agent's Ed25519 key, timestamped by RFC 3161 WebTrust certificate authorities (FreeTSA, DigiCert, Sectigo), and anchored as an entry in Sigstore's Rekor transparency log, producing a proof that can be verified independently of ArkForge. Integration is a one-line base URL change plus an API key header, with no SDK required; the proxy returns the original response alongside the proof and is compatible with LangChain, AutoGen, CrewAI, and raw HTTP clients across providers such as OpenAI, Anthropic, Mistral, and internal APIs.

The service targets two groups: compliance and risk teams (CISOs, DPOs, legal) at EU-regulated enterprises needing documented evidence of AI system behavior for audits, regulatory submissions under the EU AI Act, or contractual disputes, and engineering teams integrating certified logging into agent pipelines with minimal code changes. Stated use cases include resolving provider billing disputes, producing third-party audit evidence, and tracking integrity across multi-agent chains where output passes between multiple agents.

The free tier includes 1,000 certified proofs per month with no credit card required; paid plans start at 29 euros per month.

Key features

  • Seals every agent API call with an Ed25519 signature over request and response hashes
  • Timestamps calls via RFC 3161 WebTrust authorities (FreeTSA, DigiCert, Sectigo)
  • Anchors proof entries in Sigstore's public Rekor transparency log
  • Drop-in proxy integration via a one-line base URL change, no SDK required
  • Compatible with LangChain, AutoGen, CrewAI, and any raw HTTP client
  • Provider-agnostic — certifies calls to OpenAI, Anthropic, Mistral, and internal APIs

Frequently asked questions

Is there a free tier?

Yes, the free tier provides 1,000 certified proofs per month with no credit card required. Paid plans start at €29/month.

How do I integrate ArkForge into my stack?

Replace your API endpoint's base URL with the ArkForge proxy URL and add your API key; no SDK or agent rewrite is needed.

What frameworks and clients does it work with?

It is compatible with LangChain, AutoGen, CrewAI, and any raw HTTP client, and works with any model or provider including OpenAI, Anthropic, and Mistral.

Can ArkForge alter or revoke a proof after issuance?

No, verification bypasses ArkForge entirely by checking directly with DigiCert, FreeTSA, and Rekor, so ArkForge cannot alter a proof, revoke a timestamp, or remove a Rekor entry.

Who is ArkForge designed for?

It targets CISOs, DPOs, and legal teams at EU-regulated enterprises needing documented evidence for audits or disputes, as well as engineering teams integrating certified proofs into AI agent pipelines.

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