MCP.Market

Nsgoods Workbench MCP server

online · 100% uptime
by nsgoods.org·org.nsgoods/nsgoods-workbench-mcp·v1.0.0·2 stars
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Read only x402 catalogue: payability verdicts, prices, drift, host status, signatures. No wallet.

A91/100grade A
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Safety scan
A91/100

full report

Adoption
Growing

2 stars

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

Nsgoods Workbench tools (8)

write = sends, deletes, buys or posts
  • catalogue_statsFree

    Size and health of the x402 catalogue as of the latest full scan: resources, hosts, verdict counts, and payable endpoints per network.

  • drift_statusFree

    Verdict changes between the two latest full scans (catalogue wide, or for one host), plus the declared model drift watch.

  • find_endpointsFree

    Search the catalogue by host or URL substring. Returns up to `limit` endpoints (max 50) with their latest verdict, plus the total match count. Use this first when you do not know the exact resource URL. Rows with in_latest_scan=false were not in the latest full scan; read last_checked_at for when they were last probed. Optional network filter (for example eip155:8453 or solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp) and sort=price for the cheapest first. last_checked_at is the last time any scan looked at the resource; verdict_since is when the current verdict was first observed in the unbroken run that leads to it.

  • host_summaryFree

    Summary for a host (no time series): first/last seen, current verdict mix, n_resources, total verdict changes, gone_since if absent from the latest full scan, and a small resources_sample. Sample rows with in_latest_scan=false were not in the latest full scan; read last_checked_at for when they were last probed. n_resources counts every resource ever seen for this host; current_verdict_mix and n_payable_last_full count only the latest full scan. last_checked_at is the last time any scan looked at the resource; verdict_since is when the current verdict was first observed in the unbroken run that leads to it.

  • payability_verdictFree

    Latest payability observation for one exact resource URL (path and query included), with the meaning of the verdict, remediation if it cannot be paid, and the per-network options seen. last_checked_at is the last time any scan looked at the resource; verdict_since is when the current verdict was first observed in the unbroken run that leads to it.

  • reportsFree

    Published weekly payability reports (from the signed manifest).

  • verify_signatureFree

    Offline EIP-191 verify of a signed nsgoods response. Identifies the service from the manifest (or the optional `service` arg), strips exactly that service's post-sign fields, canonicalises (JCS, both ASCII modes), recovers the signer and checks it against the published manifest signers. Reproduction-attestation (JCS/byte-length) and envelope (signer/signature, components) shapes are reported as unsupported_shape, not verified here. Refusals carry a distinct status: malformed_signature (signature is not a 65-byte 0x-prefixed hex string), schema_rejected (the body carries a signed_by/signature pair but fails the required field shape for every service the claimed signer covers; recovery was not attempted, checked is false, reasons lists the failed candidates), signature_mismatch (well-formed but recovers a different address than signed_by under every candidate service recipe of this signer), no_flat_recipe (signed_by is a manifest signer but every service it covers uses an envelope shape, so there is no flat recipe to check; recovery was not attempted, checked is false), unknown_signer (signed_by is not a manifest signer; recovery was not attempted, checked is false), unsupported_shape, or the no-signed_by/signature-pair case. checked is true only when EIP-191 recovery actually ran; every other refusal reports checked false.

  • x401_statusFree

    Current x401 emitter adoption across the scanned catalogue (from the daily watcher).

Public scan report

scanner v0.1.10 · 2026-10-03 · same rubric, same numbers if you re-run it

no findings
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 1053ms20/20
  • Tool poisoning8 tool descriptions checked15/15
  • Auth qualityopen endpoint, read-only tools10/15
  • Maintenancelast push 3 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 Nsgoods Workbench 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 48,255 servers
Tools
8
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
87 ms
faster than 87% of 30,031 servers
GitHub stars
2
more than 75% of 28,688 servers

What its tools let an agent do: 7 read · 1 change

Install Nsgoods Workbench in Claude Code, Cursor or VS Code

claude mcp add --transport http nsgoods-workbench-mcp https://mcp.nsgoods.org/mcp
Add to Cursor

What the publisher says

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

nsgoods Workbench MCP

Read only index of the weekly x402 catalogue scan. Which endpoints are payable, what they cost, which hosts are gone.No wallet. No sign in. No payments handled by this server.

What it answers

A hosted Model Context Protocol server over our weekly full scan of the x402 catalogue: is this endpoint payable, what does it cost, which host is gone, which endpoints match a keyword, and whether a signed nsgoods response verifies offline.

Hosted endpoint: https://mcp.nsgoods.org/mcp (Streamable HTTP, no sign in, 300 tool calls per IP per day). Landing and docs: https://mcp.nsgoods.org/ · Health: https://mcp.nsgoods.org/health

Data is point in time from the last full scan. Every answer carries as_of and the scan id. For a live check of one endpoint before paying, use the paid /payable oracle on the hub. This server is the index.

Connect

Claude (web or desktop)

  1. Settings, then Connectors, then Add custom connector
  2. Name: nsgoods. URL: https://mcp.nsgoods.org/mcp. No sign in.
  3. New conversation, then ask for example: Using nsgoods, find the cheapest payable endpoint for sanctions screening on Base

Cursor: add to mcp.json

{"mcpServers":{"nsgoods":{"url":"https://mcp.nsgoods.org/mcp"}}}

Smithery: https://smithery.ai/servers/nikosble1926/nsgoods-workbench

Any MCP client that supports Streamable HTTP works the same way.

Tools

All tools are read only and idempotent (declared through MCP tool annotations).

Verdicts: PAYABLE, NOTPAYABLE, MALFORMED402, CANNOTPAYEITHER_VERB, UNREACHABLE, SKIPPED, UNKNOWN.

Example

A live find_endpoints("erc20-balance", 2) call, trimmed to two rows:

{
  "query": "erc20-balance",
  "total_matches": 6,
  "returned": 2,
  "endpoints": [
    {
      "resource": "https://api.onesource.io/api/chain/erc20-balance",
      "host": "api.onesource.io",
      "last_verdict": "PAYABLE",
      "host_gone_since": null,
      "price": "0.003 USDC on eip155:8453"
    },
    {
      "resource": "https://app.heinrichstech.com/v1/cdp/chain/erc20-balance",
      "host": "app.heinrichstech.com",
      "last_verdict": "PAYABLE",
      "host_gone_since": null,
      "price": "0.003 USDC on eip155:8453"
    }
  ],
  "as_of": "2026-09-13",
  "index_scan_id": "scan-20260913T050332Z"
}

Shortened. The full README is on GitHub.

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

Nsgoods Workbench: common questions

Is Nsgoods Workbench MCP server safe?
Yes, by our scan: it is graded A (91/100). Read the Nsgoods Workbench safety report
How do I install Nsgoods Workbench?
It runs remotely at mcp.nsgoods.org. 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 Nsgoods Workbench need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Nsgoods Workbench maintained?
The last commit was 35 days ago (2026-09-30). The latest release is v1.0.0.
Is Nsgoods Workbench up?
100% of our last 28 checks got an answer. We check remote servers about four times a day.
How does Nsgoods Workbench compare with other MCP servers?
safety score 91/100 (higher than 85% of 48,255 servers); tools 8 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.