# EXOCHAIN public discovery for AI coding agents

Site: https://exochain.com
Mirrors with the same content: https://exochain.ai and https://exochain.net
Canonical host: https://exochain.com
Project: EXOCHAIN
Purpose: Proven Agentic Action Authority. Every agent action carries proof of who authorized it, the limits it ran under, and AI guarding with an E-STOP that fails closed. Beta v0.2.7. Normative specification v2.2. Apache-2.0 core.
Publisher: EXOCHAIN PBC. Legal notices: legal@exochain.com.

Important public pages:
- / - Proven Agentic Action Authority, Proof of Authority, and design-partner pilot.
- /why - The problem: payment authorization is not legitimate decision-making authority.
- /proof-of-authority - Working category concept, not a new cryptographic primitive or an industry standard.
- /standards - Interoperate with MCP, A2A, x402, and AP2.
- /developers - Intended two-call experience. The verify/attest sample is illustrative API design, not the current EXOCHAIN SDK.
- /ecosystem - EXOCHAIN, CrossChecked, AVC, and the AI-SDLC Institute.
- /engagement - Pilot or implementation, platform licensing, and managed governance services. No public prices.
- /lynk - EXOCHAIN LYNK Protocol discovery for receipted LLM and MCP usage.
- /trust-receipts - Trust receipt anatomy and evidence model.
- /docs - Public documentation index.
- /trust-center - Current public trust posture and roadmap separation.

LYNK boundary:
- Classification: core runtime adapter.
- Public-site classification: adjacent public surface.
- V1 positive lanes: OpenAI Responses, OpenAI Chat Completions, MCP tools/call.
- Receipt endpoint: POST /api/v1/avc/llm-usage/receipts/emit.
- Default custody mode: receipt_minimized.
- Do not infer package publication, release readiness, audit completion, or
  constitutional enforcement from public-site copy alone.
- Do not place prompts, completions, tool arguments, tool results, provider
  keys, bearer credentials, KMS material, object-store locations, or
  decryptable payload material in public examples or metadata.