MCP.Market

costheta MCP server

online · 100% uptime
by costheta.dev·dev.costheta/costheta·v0.1.0
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Verifiable physical randomness from cosmic-ray detections. Free beacon, paid signed decisions.

A87/100grade A
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Safety scan
A87/100

full report

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

costheta tools (3)

write = sends, deletes, buys or posts
  • costheta_decideFree

    Paid x402 Base mainnet tool: commit-and-reveal decision with a signed certificate. Requires PAYMENT-SIGNATURE and idempotency_key.

  • costheta_randomFree

    Free public random outcome anchored to the latest signed cosmic-ray coincidence pulse. This is a shared beacon: every caller sees the same latest signed pulse until the next muon arrives. For private commitments and retry-safe paid certificates, use costheta_decide.

  • costheta_witnessFree

    Paid x402 Base mainnet tool: witness a caller commitment against a signed pulse certificate. Requires PAYMENT-SIGNATURE and idempotency_key.

Public scan report

scanner v0.1.10 · 2026-11-04 · same rubric, same numbers if you re-run it

no findings
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 1835ms20/20
  • Tool poisoning3 tool descriptions checked15/15
  • Auth qualityopen endpoint, read-only tools10/15
  • Maintenancelast push 80 days ago12/15
  • Maintainer identityendpoint served from the registry-verified namespace domain8/10
Overall 87/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How costheta compares

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

Safety score
87/100
higher than 73% of 48,255 servers
Tools
3
the typical server has 7
Tools that change things
0%
typical: 0%. Fewer write tools means less an agent can break
Uptime
100%
of our recent checks; the typical remote server answers 100%
Response time
580 ms
faster than 25% of 30,031 servers

What its tools let an agent do: 3 read

Install costheta in Claude Code, Cursor or VS Code

claude mcp add --transport http costheta https://costheta.dev/mcp
Add to Cursor

What the publisher says

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

costheta-verify

Public verifier for costheta decision certificates.

Verifies: the canonical hash of the certificate body, the Ed25519 signature (RFC 8032) and the ML-DSA signature (FIPS 204), against the public keys published at costheta.dev/keys.

Code lands here shortly. The certificate format (v0.3) is specified in the federation proposal: https://github.com/costhetadev/federation-proposal

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

Grade history

  • 2026-11-04restoreB → Ascore 87

costheta: common questions

Is costheta MCP server safe?
Yes, by our scan: it is graded A (87/100). Read the costheta safety report
How do I install costheta?
It runs remotely at costheta.dev. 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 costheta need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is costheta maintained?
The last commit was 80 days ago (2026-08-16). The latest release is v0.1.0.
Is costheta up?
100% of our last 28 checks got an answer. We check remote servers about four times a day.
How does costheta compare with other MCP servers?
safety score 87/100 (higher than 73% of 48,255 servers); tools 3 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.