MCP.Market

Touchstone MCP server

online · 96% uptime
by petrkrulis2022·io.github.petrkrulis2022/touchstone-mcp·v0.1.0
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Dated SIU, the benchmark price of AI inference work: one free tool, three paid via x402.

B80/100grade B
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Safety scan
B80/100

full report

Adoption
Growing

0 stars

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If you have run it, two minutes of your experience saves the next person an afternoon.

Touchstone tools (4)

write = sends, deletes, buys or posts
  • convertFree

    Convert a model call's token counts into SIU and USD.

  • get_indexFree

    The signed Dated SIU print. Free — citation is the business.

  • get_quoteFree

    SIU price, exchange rate and index refs for one task class and model.

  • verify_receiptFree

    Reads an on-chain settlement and returns a signed attestation.

Public scan report

scanner v0.1.10 · 2026-10-29 · same rubric, same numbers if you re-run it

no findings
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 7609ms12/20
  • Tool poisoning4 tool descriptions checked15/15
  • Auth qualityopen endpoint, read-only tools10/15
  • Maintenancelast push 1 days ago15/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 80/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Touchstone compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
80/100
higher than 60% of 48,243 servers
Tools
4
the typical server has 7
Tools that change things
0%
typical: 0%. Fewer write tools means less an agent can break
Uptime
96%
of our recent checks; the typical remote server answers 100%
Response time
1,698 ms
faster than 5% of 30,027 servers

What its tools let an agent do: 4 read

Install Touchstone in Claude Code, Cursor or VS Code

claude mcp add --transport http touchstone-mcp https://mcp.touchstoneassay.com/mcp
Add to Cursor

What the publisher says

From the Touchstone repository's README, as published. We do not edit it. Read it on GitHub

Touchstone Assay

Touchstone Assay publishes Dated SIU — the benchmark price of AI inference work, measured by actually buying inference against a versioned task basket, not by surveying list prices.

The two hard invariants

rates and are never inputs to the print.

  1. The print is computed from executed runs only. Published list prices inform exchange

the buyer, or to the fee treasury — no admin path to user money exists in any code path.

  1. The escrow contract is non-custodial. Funds move only to the pre-agreed seller, back to

How to run a print

Placeholder — wired up once packages/print exists.

Docs

agent loop, real transcripts, on Base Sepolia and Arc Testnet.

  • CLAUDE.md — vocabulary, invariants, build boundaries.
  • docs/build1-spec.md — the Build 1 engineering specification.
  • docs/plan.md — orientation, dependency order, and open risks.
  • docs/architecture.md — one diagram of the whole system.
  • docs/demo.md / docs/demo-arc.md — the buyer/seller

Deployments

<!-- BEGIN GENERATED: deployments -->

Arc Testnet

Chain ID 5042002. Deployed 2026-09-05 from commit 95eea03.

Full record — transaction hashes, block numbers, constructor arguments, compiler settings, and live smoke-test results — is canonical in data/deployments/arc-testnet.json. This README section is a convenience view generated from that file (node scripts/generate-readme-deployments.mjs) and must never be hand-edited to disagree with it.

Not deployed to mainnet. Requirements before it can be:

  • treasury MUST be a Safe/multisig, not an EOA. It is immutable with no setter, so a lost key makes fee revenue permanently unrecoverable and the only remedy is redeploying the escrow and migrating every integrator.
  • Generate TOUCHSTONEPUBLISHERKEY on an air-gapped machine. The testnet key reused here has passed through repository-adjacent files.
  • DeployArcTestnet.s.sol is chain-guarded to 5042002; a mainnet deployment needs its own script and its own review.
  • Arc mainnet's own chain ID and USDC contract address must be independently re-verified against Circle's/Arc's own documentation at deploy time — never copied from this testnet record, even though Arc's testnet USDC happens to sit at a distinctive, memorable address (0x3600...0000).
  • Arc's public mainnet launches 2026-09-16 — see packages/contracts/script/DeployArcMainnet.s.sol, prepared but not run, with its chain-id guard deliberately left as an env-var placeholder rather than a guessed constant.

Base Sepolia

Chain ID 84532. Deployed 2026-08-18 from commit 7b1d6ed.

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Touchstone: common questions

Is Touchstone MCP server safe?
Mostly: it is graded B (80/100). Read the Touchstone safety report
How do I install Touchstone?
It runs remotely at mcp.touchstoneassay.com. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does Touchstone need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Touchstone maintained?
The last commit was 8 days ago (2026-10-29). The latest release is v0.1.0.
Is Touchstone up?
96% of our last 28 checks got an answer. We check remote servers about four times a day.
How does Touchstone compare with other MCP servers?
safety score 80/100 (higher than 60% of 48,243 servers); tools 4 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.