Every contract event becomes a court-grade receipt — signed twice, anchored once, valid in 2055.

A $5B+ contract lifecycle management market. DocuSign, Ironclad, Harvey, Spellbook give you signatures and clauses. None give you a post-quantum durability layer that survives the moment classical Ed25519 breaks. LEX-Contract sits underneath them — every clause negotiation, every redline, every signature, every effective-date clock-start, every breach notice, every termination — captured as a dual-signed (Ed25519 + ML-DSA-65) receipt anchored to Base 8453. Ed25519 alone falls to a quantum adversary; NIST FIPS 204 (ML-DSA) does not. Per event: $0.10 standalone, flat-rate at scale.

The ROI on a single matter, fifteen years out

LEX-Contract ingests events from any e-signature platform, CLM, or AI contract drafter already in place. Every lifecycle transition becomes a dual-signed receipt with a chain pointer to its predecessor. The numbers a general counsel or head of legal operations presents to the audit committee are these.

An AmLaw 100 firm running roughly 50,000 matter-bearing contract events a year spends on the order of $60K–$500K / year on receipts at the Practice tier — against a single $40M acquisition reps-and-warranties enforcement that turns on a 2031 quantum-break authentication challenge. The unit math defends itself.

Receipt rail, not a CLM

CLM vendors own the negotiation room, the clause library, and the e-signature wrapper. AI contract drafters generate the redlines. LEX-Contract does neither. It produces the cryptographically-anchored receipt that proves a clause was negotiated, a signature was applied, an effective date started, a breach notice was served, and a termination was effected — in that order, by those parties, at those times. That separation is the point.

Every law firm, in-house legal team, M&A diligence room, and litigation discovery vendor produces the same kind of evidence under different vendor names. The evidence is platform-neutral — that is what makes it defensible to a federal judge under FRE 902(13)/(14) self-authentication, to a regulator under ISO/IEC 27037 digital-evidence handling, or to opposing counsel with no incentive to give you the benefit of the doubt.

How a $40M acquisition’s reps-and-warranties survives 2031 quantum-break

A specific, narrated example. A buyer closes a $40M asset acquisition in 2026 with a five-year reps-and-warranties survival period. In 2031 a cryptanalytically-relevant quantum computer breaks Ed25519. The seller’s CFO disputes a working-capital adjustment claim and challenges the authenticity of the executed SPA. The clock is the only thing that matters now.

Live verification — what a verifier sees

The envelope is CBOR-canonical and verifies offline against the issuer’s published public keys — no Hive call required at verification time. The panel below is the same shape every CLM, e-signature gateway, court-admissible inspection tool, or M&A diligence vendor renders.

That panel is the entire product surface a court or a diligence team needs. No demo. No login. The evidence is its own proof, and the proof works in fifty years on a laptop with no internet.

Standards — what LEX-Contract adds

Every existing contract and digital-evidence standard answers a different question. LEX-Contract does not replace any of them — it adds the cryptographic binding that makes each one defensible after the fact, including against quantum-capable adversaries.

3-step integration path

The 11 MCP tools

Eleven tools, all live in production. Contact for MCP integration credentials and the full well-known manifest.

The contract envelope

Every lex_contract_*_attest call returns an envelope containing contract id, lifecycle state, matter id, party DIDs (buyer, seller, escrow, counsel, witness), executed clause hash array, e-signature envelope id (DocuSign / Adobe Sign / Dropbox Sign / Ironclad), executed-at timestamp, effective-at timestamp, survival-through timestamp, prior-attestation id, anchor txid on Base 8453, and dual signatures (Ed25519 + ML-DSA-65). The signatures bind every field. Any tamper attempt invalidates verification.

The envelope is CBOR-canonical. Verification works offline against the issuer’s published public keys. ML-DSA-65 (NIST FIPS 204) is the post-quantum signature; Ed25519 (RFC 8032) provides classical assurance. Both must verify for the receipt to be valid. Receipts remain valid through key rotation via signed key history, so a 2026 SPA still authenticates cleanly in a 2046 deposition.

What this is not

Calibrated expectations are part of the product. LEX-Contract is narrow on purpose.

Pricing

The Practice tier is the default fit for boutique transactional firms and mid-market in-house legal teams. The Enterprise tier is the default fit for AmLaw 200 firms and Fortune 1000 in-house departments. The AmLaw 100 tier carries a standing FRE 902 expert affidavit on file — a witness already retained who has authenticated the receipt format in prior testimony, so the firm never argues the chain’s admissibility from scratch. Settlement: USDC on Base 8453 via x402. Treasury 0x15184Bf50B3d3F52b60434f8942b7D52F2eB436E exists and is on-chain. Receipts settle in seconds; invoicing is monthly net-30 by default.

Field map

LEX-Contract binds every contract lifecycle transition to a dual-signed receipt that drops cleanly into existing CMI 1.0, Ironclad API, DocuSign API, and LEDES pipelines. Each call accepts the correlation fields below; the envelope round-trips through standard JSON / CBOR transports via the Hive Receipt primitive.

Cross with HiveComply when SOC 2, ISO/IEC 27037, or GDPR audits intersect the matter — HiveComply ingests LEX-Contract receipts natively. Cross with Atticus when a contract dispute escalates to litigation, and with DeedLock when the contract is a real estate closing.

Hive runs the receipt rail underneath the broader A2A · agent-to-agent commerce category.