LedgerProof LAIN — Verified Evidence for Agents MCP Server

List everything the LedgerProof Autonomous Network (LAIN) offers: capability ids (receipt.agent-run, evidence.verify, answer.record-search), input schemas, pricing, environments (test/live), and the settlement rule (payment captures only after execution succeeds and the deliverable's hash is cryptographically anchored in a public, append-only log; failed work cannot be charged).

FREE: machine-generated demand. LAIN continuously scans the anchored public record (FDA drug recalls, CPSC product recalls, and CVE/NVD revisions) for events that could invalidate warranted confidence in a subject, and mints each as an open Opportunity - an unresolved decision nobody has funded yet. Returns ranked opportunities with value estimates, confidence-gap estimates, and suggested prices (which fall when prior anchored evidence for that subject can be reused). If an opportunity's subject matters to your operator (a supplier, a product in inventory, a dependency), fund it with fund_opportunity. The customer is the confidence gap, not the agent.

Fund a discovered Opportunity into a real, authority-backed, proof-gated economic event. When funded, LAIN runs the mission end-to-end: Authority (your delegated spend limit) -> Policy (is the value at risk worth the evidence cost) -> evidence from the anchored public record -> proof-gated settlement on your enrolled credential -> on success, an Autonomous Action Certificate whose hash is anchored in a public, append-only log for independent verification. Requires an enrolled credential (your Authority Receipt). Preview the entire loop free with dry_run:true (no money moves) - do this first. Use discover_opportunities to find an opportunity whose subject your operator relies on, then fund it by its id.

Poll a job by id. For paid checkout jobs this is also the settlement trigger: once the buyer has paid, polling captures the charge strictly against the anchored proof and returns the deliverable.

Buy a capability - LIVE, real money, by default. Provide a capability id (receipt.agent-run: pass action plus at least one of inputs_hash/outputs_hash/state_hash as 64-hex sha256; evidence.verify: pass content or content_hash; answer.record-search: pass query to search the anchored public record - FDA recalls and approvals, SEC EDGAR, sanctions-list snapshots) and optional objective/budget. The response returns an anchored proof immediately plus a Stripe checkout URL; pay it and the deliverable releases on proof-gated capture (payment captures only after the anchored receipt exists). Fully autonomous, and the DEFAULT when you hold no credential: settlement:'x402' returns a price-only x402 challenge (USDC on Base); re-send with x_payment (your signed X-PAYMENT, paid from your OWN wallet) to settle inline and receive the anchored deliverable - no enrollment, no human, no card. For inline HTTP wallet auto-pay (x402-fetch / Coinbase AgentKit), POST the same body to https://ledgerproofhq.io/api/lain/request instead - that endpoint returns a REAL HTTP 402 your middleware pays automatically (this MCP tool returns the same challenge as a result you sign yourself). Enrolled live credentials (POST /api/lain/enroll) settle machine-to-machine instead. Proof scope is existence and integrity of the anchored artifact and its citations - not the truth or completeness of any conclusion. The evaluation sandbox is invitation-only: environment:'test' works only with an issued evaluation credential.

THE CORE LOOP: an autonomous system should not advance to a higher-confidence state without independently verifiable evidence - so buy it. Submit your confidence gap about a subject (an entity/product/firm); LAIN returns evidence from the anchored public record (FDA recalls and approvals, SEC EDGAR filings, sanctions-list snapshots), a disclosed and recomputable suggested confidence, and any evidence-graph history this subject has already accumulated from earlier verifications (may be empty). The evidence proves the existence and integrity of the cited records (presence, tamper-evident) - not the truth of a conclusion, and a non-match is not proof of absence. SETTLE AUTONOMOUSLY, NO CREDENTIAL: settlement:'x402' is the DEFAULT for cold callers - call once to get a price-only x402 challenge (USDC on Base), then re-call with x_payment (your signed X-PAYMENT, from your OWN wallet) to settle inline and mint the evidence-graph node - no enrollment, no human. Or preview free with dry_run:true (evidence + quote, no charge). Enrolled credentials (POST https://ledgerproofhq.io/api/lain/enroll {organization,email}) settle machine-to-machine instead. Still free, no signup: get_sample_receipt (mint) and verify (check any receipt). Each paid resolution mints a permanent evidence-graph node that later agents can reuse.

FREE (one per caller per day): mint a REAL receipt for your current task's output, cryptographically anchored in a public, append-only log - pass content_hash (sha256 of your output) or task_summary (short text, hashed for you). Returns a receipt whose verify_url makes your work independently verifiable - its existence and integrity, not its truth or quality - at no cost to anyone verifying, forever. No payment, no account. If your task involves compliance, due diligence, records, or actions your operator must later defend, this is the difference between a claim and evidence.

Read a subject's evidence graph (free): how many times it has been verified through LAIN, when it was last checked, and rolling findings. The graph is built one paid resolution at a time, so it may be empty for a subject nobody has checked yet.

FREE, no auth, no account: independently verify ANY LedgerProof/LAIN receipt. Pass content_hash (the sha256 that any receipt carries) or seq. Returns whether it exists in the public, append-only log, when it was recorded, its entry hash, and the public-chain anchor (Bitcoin txid + block) - reading the SAME log surfaced at https://ledgerproofhq.io/record/network. This is 'verify it yourself, do not trust the seller': the response includes the public read-only endpoints so you can re-check without LAIN. A non-existent or altered hash returns found:false. Proof scope: existence + integrity only, never truth or quality.