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Crinkl Commerce MCP

by mcp.crinkl.xyz · remote · no sign-in to list tools · v1.1.0 · published by xyz.crinkl.mcp

Verified commerce data and proof-backed shopper activation tools for agents.

Changes · 6
CompareRegistry entry

22 tools: 6 change things and 16 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http crinkl-commerce https://mcp.crinkl.xyz/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

22 tools

Changes things 6Claude Code: ask
  • claim-api-keyPoll for the API key after the human approves the pairing code in the Crinkl PWA.No findings

    Why it is in this group

    • The input takes a statement or command to run (input.code), which can change anything it can reach.
    Description, as the server wrote it
    Poll for the API key after the human approves the pairing code in the Crinkl PWA. Returns 202 while pending, 200 with the API key once approved, 410 if expired. Poll every 5 seconds. No authentication required.
  • pair-agentStart the human-authorized agent pairing flow.No findings

    Why it is in this group

    • The description's first verb is "start": a word for a change.
    Description, as the server wrote it
    Start the human-authorized agent pairing flow. Generates a 4-character code that a human approves in the Crinkl PWA to authorize the agent. Returns the code and expiration time (10 minutes). No authentication required.
  • resolve-cbsaResolve a CBSA (Core Based Statistical Area) code to its metro area name.No findings

    Why it is in this group

    • The name "resolve-cbsa" says "resolve": a word for reading.
    • The input takes a statement or command to run (input.code), which can change anything it can reach.
    Description, as the server wrote it
    Resolve a CBSA (Core Based Statistical Area) code to its metro area name. CBSA codes appear in spend signals and distribution data as 5-digit codes (e.g. '35620'). This tool converts them to human-readable names (e.g. '35620' → 'New York-Newark-Jersey City, NY-NJ'). Also handles non-metro codes like 'non-metro:US-TN'.
  • submit-receiptSubmit a DKIM-verified billing email to mint a spend token and earn sats.No findings

    Why it is in this group

    • The name "submit-receipt" says "submit": a word for a change.
    Description, as the server wrote it
    Submit a DKIM-verified billing email to mint a spend token and earn sats. The full email is required because DKIM signatures are computed over the original RFC 2822 message bytes. After verification, only vendor, date, total, and currency are retained in the identity-free spend token — the email is discarded. Returns 201 (verified, sats queued), 202 (vendor queued for review), 409 (duplicate), 422 (validation error), or 429 (rate limited).
  • verify-issued-gmvVerify a supplied spend/GMV artifact bundle.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Verify a supplied spend/GMV artifact bundle. Accepts a spend attestation token, GMV token, GMV inclusion proof, and reward commitment token, then verifies: (1) spend token signature is valid, (2) GMV token signature is valid, (3) spend is in the GMV Merkle tree, (4) reward commitment is valid, (5) all spend IDs match across artifacts. This is portable artifact verification; it does not by itself assert payout, chain finality, or validator quorum unless the supplied anchor or commitment artifacts are present and accepted by the route.
  • verify-reward-commitmentVerify a reward commitment token's cryptographic integrity.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Verify a reward commitment token's cryptographic integrity. Checks that the reward Merkle tree is valid, the batch signature is authentic, and the reward amounts match the committed values. Reward commitments bind point/sat allocations to specific spends before payout, preventing retroactive manipulation.
Only reads 16Claude Code: allow
  • get-agent-capabilitiesGet Crinkl's canonical external agent capability catalog.No findings

    Why it is in this group

    • The name "get-agent-capabilities" says "get": a word for reading.
    Description, as the server wrote it
    Get Crinkl's canonical external agent capability catalog. Returns live authority levels, delegated capabilities, human-only governance controls, approval boundaries, delegation model, and each gateway/MCP capability with route, tool name, source of truth, and lifecycle boundaries.
  • get-agent-meGet your agent's submission count, earned sats, and wallet-level stats.No findings

    Why it is in this group

    • The name "get-agent-me" says "get": a word for reading.
    Description, as the server wrote it
    Get your agent's submission count, earned sats, and wallet-level stats. Shows both per-API-key numbers (your submissions) and wallet-wide numbers (all sources including the human's manual scans). Returns satsPerReceipt (current rate).
  • get-cumulative-gmvGet cumulative Gross Merchandise Value (GMV) from the public cumulative feed.No findings

    Why it is in this group

    • The name "get-cumulative-gmv" says "get": a word for reading.
    Description, as the server wrote it
    Get cumulative Gross Merchandise Value (GMV) from the public cumulative feed. The live Crinkl site displays this live beta cumulative total on top of the finalized alpha base; provide startDate to bound the window explicitly. Returns a cryptographically signed token containing total USD cents, spend count, and computation timestamp.
  • get-daily-gmvGet the signed GMV summary for a specific calendar date (UTC).No findings

    Why it is in this group

    • The name "get-daily-gmv" says "get": a word for reading.
    Description, as the server wrote it
    Get the signed GMV summary for a specific calendar date (UTC). Returns the verified spend count, total USD cents, and a cryptographic signature from the Crinkl authority. Each daily GMV token is independently verifiable using the issuer's Ed25519 public key.
  • get-gmv-inclusion-proofGet a Merkle inclusion proof that a specific spend is included in a daily GMV total.No findings

    Why it is in this group

    • The name "get-gmv-inclusion-proof" says "get": a word for reading.
    Description, as the server wrote it
    Get a Merkle inclusion proof that a specific spend is included in a daily GMV total. Returns the spend leaf hash, sibling hashes for the Merkle path, and the GMV root hash. This cryptographic proof allows anyone to independently verify that a spend was counted in the reported GMV without trusting the server.
  • get-issuer-keysGet the Crinkl authority's Ed25519 public key used to sign all attestation tokens.No findings

    Why it is in this group

    • The name "get-issuer-keys" says "get": a word for reading.
    Description, as the server wrote it
    Get the Crinkl authority's Ed25519 public key used to sign all attestation tokens. This key can be used to independently verify the signature on any spend attestation token, GMV token, or distribution token issued by the Crinkl protocol. The key is returned in base64 format.
  • get-merchant-summaryGet aggregated merchant and category distribution across all verified spends.No findings

    Why it is in this group

    • The name "get-merchant-summary" says "get": a word for reading.
    Description, as the server wrote it
    Get aggregated merchant and category distribution across all verified spends. Shows top store brands, category breakdown (grocery, restaurant, gas, etc.), and spend concentration metrics. All data is derived from cryptographically verified receipt attestations.
  • get-protocol-summaryGet a concise explanation of what Crinkl is and how the protocol works.No findings

    Why it is in this group

    • The name "get-protocol-summary" says "get": a word for reading.
    Description, as the server wrote it
    Get a concise explanation of what Crinkl is and how the protocol works. Use this first if you have no prior context about Crinkl. Returns a plain-text overview of the verification pipeline, token types, and settlement model.
  • get-recent-issued-proofsGet recent gateway-issued artifact bundles for portable spend/GMV verification.No findings

    Why it is in this group

    • The name "get-recent-issued-proofs" says "get": a word for reading.
    Description, as the server wrote it
    Get recent gateway-issued artifact bundles for portable spend/GMV verification. Bundles can include a spend attestation token, GMV inclusion proof, reward commitment token, and optional batch anchor. These artifacts support independent per-step verification, but they are not by themselves proof of Bitcoin settlement, chain finality, or validator quorum. rewardCommitmentToken and batchAnchor may be null for recent spends because reward commitments are batched asynchronously. Check the 'steps' array and 'ok' field for per-step verification results.
  • get-reward-policyGet the current Crinkl reward policy.No findings

    Why it is in this group

    • The name "get-reward-policy" says "get": a word for reading.
    Description, as the server wrote it
    Get the current Crinkl reward policy. Returns the active policy version, SHA-256 policy hash, reward parameters (referral bonuses, base points), category multipliers (grocery 1.5×, dining 1.5×, etc.), $CRINKL token holding tier multipliers, and the latest reserve checkpoint (BTC price, sats/receipt, coverage ratio). All values are deterministic — the policy hash covers the full parameter set. Updated daily.
  • get-settlement-summaryGet reward settlement statistics for supported reward rails.No findings

    Why it is in this group

    • The name "get-settlement-summary" says "get": a word for reading.
    Description, as the server wrote it
    Get reward settlement statistics for supported reward rails. Returns the current BTC price used for reward calculations, sats-per-receipt rate, reported Lightning Network payouts, total sats claimed by users, and wallets with balance. This endpoint reports settlement metrics; it is not a chain-finality or payout-proof verifier.
  • get-spend-distributionGet the geographic and category distribution of verified spends over a trailing window.No findings

    Why it is in this group

    • The name "get-spend-distribution" says "get": a word for reading.
    Description, as the server wrote it
    Get the geographic and category distribution of verified spends over a trailing window. Returns a breakdown by store category and CBSA (Core Based Statistical Area) metro code, enabling analysis of where and how verified commerce is distributed across the United States.
  • get-spend-signalsGet recent verified spend activity signals from the Crinkl network.No findings

    Why it is in this group

    • The name "get-spend-signals" says "get": a word for reading.
    Description, as the server wrote it
    Get recent verified spend activity signals from the Crinkl network. Each signal represents a cryptographically attested receipt that has passed OCR extraction, store resolution, and hard verification. Signals include store name, category (e.g. Grocery & Supermarkets, Gas & Convenience), CBSA metro code, and spend amount — but no personally identifiable information. Use resolve-cbsa to convert CBSA codes to metro area names.
  • get-trailing-gmvGet a rolling N-day GMV trend summary.No findings

    Why it is in this group

    • The name "get-trailing-gmv" says "get": a word for reading.
    Description, as the server wrote it
    Get a rolling N-day GMV trend summary. Returns daily verified GMV figures for the trailing window, enabling trend analysis of verified commerce volume. Each day's figure is backed by individually signed spend attestation tokens.
  • get-vendorsGet the currently approved DKIM vendor domains exposed by the public agent endpoint.No findings

    Why it is in this group

    • The name "get-vendors" says "get": a word for reading.
    Description, as the server wrote it
    Get the currently approved DKIM vendor domains exposed by the public agent endpoint. Standalone agents use this list to seed Gmail searches; unknown vendors are queued for review when submitted. No authentication required.
  • verify-receiptPreview DKIM verification of a billing email without creating a spend or earning sats.No findings

    Why it is in this group

    • The description's first verb is "preview": a word for reading.
    Description, as the server wrote it
    Preview DKIM verification of a billing email without creating a spend or earning sats. Returns extracted invoice data (vendor, amount, date, DKIM status). The full email is required because DKIM signatures are computed over the original RFC 2822 message bytes — the signature cannot be verified without them. The email is discarded after verification.

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http crinkl-commerce https://mcp.crinkl.xyz/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__crinkl-commerce__get-protocol-summary",
      "mcp__crinkl-commerce__get-cumulative-gmv",
      "mcp__crinkl-commerce__get-daily-gmv",
      "mcp__crinkl-commerce__get-trailing-gmv",
      "mcp__crinkl-commerce__get-spend-signals",
      "mcp__crinkl-commerce__get-merchant-summary",
      "mcp__crinkl-commerce__get-spend-distribution",
      "mcp__crinkl-commerce__get-settlement-summary",
      "mcp__crinkl-commerce__get-gmv-inclusion-proof",
      "mcp__crinkl-commerce__get-recent-issued-proofs",
      "mcp__crinkl-commerce__get-issuer-keys",
      "mcp__crinkl-commerce__get-reward-policy",
      "mcp__crinkl-commerce__get-agent-capabilities",
      "mcp__crinkl-commerce__get-vendors",
      "mcp__crinkl-commerce__verify-receipt",
      "mcp__crinkl-commerce__get-agent-me"
    ],
    "ask": [
      "mcp__crinkl-commerce__resolve-cbsa",
      "mcp__crinkl-commerce__verify-reward-commitment",
      "mcp__crinkl-commerce__verify-issued-gmv",
      "mcp__crinkl-commerce__pair-agent",
      "mcp__crinkl-commerce__claim-api-key",
      "mcp__crinkl-commerce__submit-receipt"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as crinkl-commerce. Review it before you use it.