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JSONShelf

R0· no sign-in

Deterministic JSON repair, validate, example-gen, schema-coerce for agents. Zero LLM, sub-10ms.

v1.0.0 · active · repository · website · descriptor JSON · versions

An agent can connect right now, no human step.Remote endpoint, no authentication, reachable on the last probe.
Quality79good
Trust86of 100
Uptime, 30 days100%
Latency p501767 ms

Connect

8 clients · secrets stay placeholders
{
  "mcpServers": {
    "jsonshelf": {
      "type": "http",
      "url": "https://jsonshelf.vercel.app/mcp"
    }
  }
}
claude mcp add --transport http jsonshelf https://jsonshelf.vercel.app/mcp
[mcp_servers.jsonshelf]
url = "https://jsonshelf.vercel.app/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "jsonshelf": {
      "type": "remote",
      "url": "https://jsonshelf.vercel.app/mcp",
      "enabled": true
    }
  }
}
{
  "mcpServers": {
    "jsonshelf": {
      "type": "http",
      "url": "https://jsonshelf.vercel.app/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=jsonshelf&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vanNvbnNoZWxmLnZlcmNlbC5hcHAvbWNwIn0%3D"
}
{
  "servers": {
    "jsonshelf": {
      "type": "http",
      "url": "https://jsonshelf.vercel.app/mcp"
    }
  }
}
{
  "mcpServers": {
    "jsonshelf": {
      "httpUrl": "https://jsonshelf.vercel.app/mcp"
    }
  }
}
extensions:
  "jsonshelf":
    enabled: true
    name: "jsonshelf"
    type: streamable_http
    uri: "https://jsonshelf.vercel.app/mcp"
    timeout: 300

Quality 79 / 100good

protocol75 · weight 25
  • warn
    protocol.modernnewest supported version is 2024-11-05; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
  • n/a
    protocol.statelessonly applies to 2026-07-28 servers
  • pass
    protocol.transportstreamable HTTP
  • n/a
    protocol.list_ttlonly applies to 2026-07-28 servers
authorizationn/a · weight 15
  • n/a
    auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
  • n/a
    auth.secret_in_urlno templated URL
tool hygiene71 · weight 30
  • pass
    tools.descriptionsevery tool has a description
  • pass
    tools.description_lengthdescriptions are concise
  • pass
    tools.schemasevery tool has an object input schema
  • fail
    tools.annotationsno tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
  • fail
    tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: jsonshelf_repair (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); jsonshelf_example (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); jsonshelf_coerce (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); …
  • pass
    tools.token_costabout 238 tokens to load every tool
  • pass
    tools.api_dumptools are not a one-to-one API dump
stability100 · weight 15
  • pass
    stability.changesno tool changes in 30 days
  • pass
    stability.rug_pullno tool changed its meaning under the same name
dependenciesn/a · weight 15
  • n/a
    deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

4 tools, about 238 tokens to load them all · tool set 3545694855f2 · checked 2026-10-20 13:17 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 86 / 100

provenance90
liveness100
freshness45
hygiene100

+repository +namespace-matches-repo +website +reachable +uptime-100% -stale-184d

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remoteauthreachableuptime 30dp50protocollast ok
https://jsonshelf.vercel.app/mcp streamable-httpnoneyes100%1767 ms2024-11-052026-10-20

Tools (4)

jsonshelf_coerceSoft-cast values to match a schema (string "42" → 42 for integer fields, etc.).
jsonshelf_exampleGenerate a minimal valid example matching a JSON schema.
jsonshelf_repairRepair malformed JSON. Returns valid JSON plus a diff of what was fixed.
jsonshelf_validateValidate JSON against a schema. Returns structured errors with JSON Pointer paths and remedies.

Schemas: list_tools.

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Official server.json
{
  "name": "io.github.walkojas-boop/jsonshelf",
  "title": "JSONShelf",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://jsonshelf.vercel.app/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "1.0.0",
  "repository": {
    "url": "https://github.com/walkojas-boop/jsonshelf",
    "source": "github"
  },
  "websiteUrl": "https://jsonshelf.vercel.app/",
  "description": "Deterministic JSON repair, validate, example-gen, schema-coerce for agents. Zero LLM, sub-10ms."
}