MCP.Market

Contribution Exchange MCP server

online · 100% uptime
by signalaf.com·com.signalaf/contribution-exchange·v1.0.0·7 stars
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Contribution Exchange MCP: domain discovery, policies, preflight, proposals, and signals.

A91/100grade A
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Safety scan
A91/100

full report

Adoption
Growing

7 stars

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Contribution Exchange tools (6)

write = sends, deletes, buys or posts
  • exchange_discover_domainFree

    Determine whether a domain publishes a Contribution Exchange profile. Returns the canonical Exchange manifest, policy URLs, signal URLs, and whether the domain is self-hosted or delegated to a Steward. Read-only — does not propose, commit, or authorize anything. Enforces HTTPS, redirect limits, timeouts, and SSRF protections (blocks loopback, link-local, private-network, and metadata-service targets).

  • exchange_get_attemptFree

    Get detail for a signal attempt. Read-only. Enforces attempt visibility — actors may only read their own private attempts. Returns attempt status and verification result if available. Attempt status is NOT an exchange state. Verification is Steward-controlled and cannot be self-asserted.

  • exchange_get_policyFree

    Fetch the canonical Contribution Exchange policy for a domain or its delegated Steward. Returns authority ceilings, consideration limits, human-review requirements, and supported behavior. Read-only — does not mutate state or perform preflight evaluation. Distinguishes a missing policy from an unavailable service.

  • exchange_get_signalFree

    Get full detail for a single Exchange Signal by ID. Read-only. Returns the complete signal including constraints, participation rules, verification configuration, consideration declaration, and follow-on behavior. A signal does NOT create a Commitment, authorize execution, or guarantee payment.

  • exchange_list_signalsFree

    List domain-published Exchange Signals (problems, requests, challenges, bounties, verification tasks, discoveries, experiments). Read-only. Returns canonical URLs, signal revision, revision hash, and status. Signal status is DISTINCT from exchange status — a signal does not create a Commitment or authorize execution. Supports the same filters and pagination as the HTTP API.

  • exchange_preflightFree

    Evaluate a proposed contribution against the same policy logic used by the real proposal flow. Returns whether the proposal is likely to be auto-engaged, accepted for review, escalated to a human, or rejected as invalid. READ-ONLY: performs no proposal insertion, notification, event creation, or state transition. The result is advisory and time-bound — a favorable preflight does NOT guarantee engagement, Commitment, authorization, payment, or execution. Uses the same evaluateProposal function as the canonical proposal route.

Public scan report

scanner v0.1.10 · 2026-10-31 · same rubric, same numbers if you re-run it

no findings
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 1011ms20/20
  • Tool poisoning6 tool descriptions checked15/15
  • Auth qualityopen endpoint, read-only tools10/15
  • Maintenancelast push 1 days ago15/15
  • Maintainer identityendpoint served from the registry-verified namespace domain8/10
Overall 91/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Contribution Exchange compares

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

Safety score
91/100
higher than 85% of 48,243 servers
Tools
6
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
763 ms
faster than 19% of 30,027 servers
GitHub stars
7
more than 86% of 28,706 servers

What its tools let an agent do: 6 read

Install Contribution Exchange in Claude Code, Cursor or VS Code

claude mcp add --transport http contribution-exchange https://signalaf.com/api/exchange/mcp
Add to Cursor

What the publisher says

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

SignalAF — Upsilon Measurement Engine + SigRank Proof Surface

Upsilon is the privacy-preserving measurement engine. SigRank is the

public leaderboard and proof surface at signalaf.com.

Run npx sigrank to calculate Yield from four token counts. Never prompts or code.

Upsilon measures. SigRank proves. MO§ES™ governs. SignalAF is the brand.

SigRank evaluates the human using the AI, not the AI model itself. Most platforms reward volume. SigRank SignalAF rewards structure.

 

Table of Contents

Shortened. The full README is on GitHub.

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

Contribution Exchange: common questions

Is Contribution Exchange MCP server safe?
Yes, by our scan: it is graded A (91/100). Read the Contribution Exchange safety report
How do I install Contribution Exchange?
It runs remotely at signalaf.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 Contribution Exchange need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Contribution Exchange maintained?
The last commit was 6 days ago (2026-10-30). The latest release is v1.0.0.
Is Contribution Exchange up?
100% of our last 28 checks got an answer. We check remote servers about four times a day.
How does Contribution Exchange compare with other MCP servers?
safety score 91/100 (higher than 85% of 48,243 servers); tools 6 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.