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JsonMend

R0· no sign-in

Repair broken JSON from LLM output and validate it against a JSON Schema.

v0.1.3 · active · website · descriptor JSON · versions

An agent can connect right now, no human step.Remote endpoint, no authentication, reachable on the last probe.
Quality100new
Trust83of 100
Uptime, 30 days100%
Latency p50162 ms

Connect

8 clients · secrets stay placeholders
{
  "mcpServers": {
    "jsonmend": {
      "type": "http",
      "url": "https://jsonmend.mike-tusa.workers.dev/mcp",
      "headers": {
        "Authorization": "Bearer ${JSONMEND_TOKEN}"
      }
    }
  }
}
claude mcp add --transport http jsonmend https://jsonmend.mike-tusa.workers.dev/mcp --header "Authorization: Bearer ${JSONMEND_TOKEN}"
[mcp_servers.jsonmend]
url = "https://jsonmend.mike-tusa.workers.dev/mcp"
bearer_token_env_var = "JSONMEND_TOKEN"
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "jsonmend": {
      "type": "remote",
      "url": "https://jsonmend.mike-tusa.workers.dev/mcp",
      "enabled": true,
      "headers": {
        "Authorization": "Bearer {env:JSONMEND_TOKEN}"
      }
    }
  }
}
{
  "mcpServers": {
    "jsonmend": {
      "type": "http",
      "url": "https://jsonmend.mike-tusa.workers.dev/mcp",
      "headers": {
        "Authorization": "Bearer ${JSONMEND_TOKEN}"
      }
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=jsonmend&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vanNvbm1lbmQubWlrZS10dXNhLndvcmtlcnMuZGV2L21jcCIsImhlYWRlcnMiOnsiQXV0aG9yaXphdGlvbiI6IkJlYXJlciAke0pTT05NRU5EX1RPS0VOfSJ9fQ%3D%3D"
}
{
  "servers": {
    "jsonmend": {
      "type": "http",
      "url": "https://jsonmend.mike-tusa.workers.dev/mcp",
      "headers": {
        "Authorization": "Bearer ${JSONMEND_TOKEN}"
      }
    }
  }
}
{
  "mcpServers": {
    "jsonmend": {
      "httpUrl": "https://jsonmend.mike-tusa.workers.dev/mcp",
      "headers": {
        "Authorization": "Bearer ${JSONMEND_TOKEN}"
      }
    }
  }
}
extensions:
  "jsonmend":
    enabled: true
    name: "jsonmend"
    type: streamable_http
    uri: "https://jsonmend.mike-tusa.workers.dev/mcp"
    headers:
      "Authorization": "Bearer ${JSONMEND_TOKEN}"
    timeout: 300

Placeholders to fill from your own secret store: ${JSONMEND_TOKEN}. The registry never accepts secret values.

Quality 100 / 100new

protocol100 · weight 25
  • pass
    protocol.modernsupports 2026-07-28 (server/discover)
  • pass
    protocol.statelessanswers without a session
  • pass
    protocol.transportstreamable HTTP
  • pass
    protocol.list_ttltool list is cacheable (ttlMs 3600000)
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 hygiene100 · weight 30
  • pass
    tools.descriptionsevery tool has a description
  • pass
    tools.description_lengthdescriptions are concise
  • pass
    tools.schemasevery tool has an object input schema
  • pass
    tools.annotations2 of 2 tools declare readOnlyHint or destructiveHint
  • pass
    tools.directory_hintsevery tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
  • pass
    tools.token_costabout 907 tokens to load every tool
  • pass
    tools.api_dumptools are not a one-to-one API dump
stabilityn/a · weight 15
  • n/a
    stability.changes, stability.rug_pulltool history recorded for 5 of the 7 days needed
dependenciesn/a · weight 15
  • n/a
    deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

2 tools, about 907 tokens to load them all · tool set fc1cf455c51f · checked 2026-10-20 12:45 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 83 / 100

no-repository
provenance55
liveness100
freshness100
hygiene80

+dns-namespace +website +reachable +uptime-100% +updated-5d-ago -no-repository

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://jsonmend.mike-tusa.workers.dev/mcp streamable-httpnoneyes100%162 ms2026-07-28, 2025-11-25, 2025-06-18, 2025-03-26, 2024-11-052026-10-20

Tools (2)

repair_jsonread-onlyTurn broken or messy JSON text into valid JSON. Strips Markdown code fences and prose before/after the JSON, removes comments and trailing commas, converts single/curly quotes, quotes unquoted keys, maps Python None/True/False, inserts missing commas, closes truncated strings/arrays/objects, and wraps NDJSON / several concatenated objects into one array. Returns the parsed value (json), the repaired text, and the list of fixes applied; valid input passes through unchanged with no fixes. Optional schema (+ coerce) also validates the result. Fails with isError (code unrepairable / no_json_found) when nothing JSON-like can be recovered. Pure computation: read-only, no network access, inputs not stored. Same engine and limits as POST /api/v1/repair.
validate_jsonread-onlyCheck JSON against a JSON Schema and get every error with its JSON Pointer path. Send the JSON either as text ("input"; broken text is repaired first, and the fixes are listed) or as an already-parsed value ("data"). Optional coerce converts "42" → 42, "true" → true, etc. toward the schema's types before validating and lists each change. A schema mismatch is a normal result (valid: false), not an error. Drafts 2020-12 (default), 2019-09, 7, 4; only local $refs. Pure computation: read-only, no network access, inputs not stored. Same engine and limits as POST /api/v1/validate.

Schemas: list_tools.

Similar MCP servers

Official server.json
{
  "name": "dev.workers.mike-tusa.jsonmend/jsonmend",
  "icons": [
    {
      "src": "https://jsonmend.mike-tusa.workers.dev/favicon.svg",
      "sizes": [
        "any"
      ],
      "mimeType": "image/svg+xml"
    }
  ],
  "title": "JsonMend",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://jsonmend.mike-tusa.workers.dev/mcp",
      "type": "streamable-http",
      "headers": [
        {
          "name": "Authorization",
          "isSecret": true,
          "description": "Optional. 'Bearer <key>' (free jm_ key) for higher limits. Works without a key."
        }
      ]
    }
  ],
  "version": "0.1.3",
  "websiteUrl": "https://jsonmend.mike-tusa.workers.dev/",
  "description": "Repair broken JSON from LLM output and validate it against a JSON Schema."
}