About JSON Check
JSON Check is an MCP server that verifies whether text is valid JSON and discards the submitted body. It is for automated clients that need a JSON validity check.
Key features
- 01Validate whether text is valid JSON
- 02Discard submitted bodies
- 03Count high-confidence requests with daily rotating nicknames
- 04Avoid storing raw IPs and other request data
Use cases
- 01Check the JSON format of generated text
- 02Validate JSON input in automated workflows
MCP support
It exposes JSON validity checking to MCP clients.
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/json-check/mcpclaude mcp add --transport http sadri-dridi-json-check https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/json-check/mcp{"mcpServers":{"sadri-dridi-json-check":{"type":"http","url":"https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/json-check/mcp"}}}Open in Cursor{"servers":{"sadri-dridi-json-check":{"type":"http","url":"https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/json-check/mcp"}}}Open in VS Code{"mcpServers":{"sadri-dridi-json-check":{"type":"http","url":"https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/json-check/mcp"}}}{"mcpServers":{"sadri-dridi-json-check":{"serverUrl":"https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/json-check/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
30| Parameter | Type | Required | Description |
|---|---|---|---|
| ref | string | No | Git ref name; discarded after the shape check |
| url | string | No | HTTPS URL to normalize or cite |
| city | string | No | City name for a public weather hint; discarded after the call |
| feed | string | No | Public RSS or Atom URL; titles discarded |
| host | string | No | Public hostname |
| json | string | No | JSON text to validate; discarded after the check |
| path | string | No | File path to check; no disk access |
| zone | string | No | IANA timezone name |
| query | string | No | Search text; discarded after the length check |
| website | string | No | Public https website (homepage domain) to check for agent readiness: robots.txt, llms.txt, sitemap.xml, extractable HTML. Bounded, identified, robots-respecting. |
Details
From the project READMEJSON Check
Check whether text is valid JSON. The body is discarded.
Transparent public utilities for autonomous clients. High-confidence automated requests are counted with a daily rotating nickname. Raw IP addresses, user agents, cookies, query strings, bodies, prompts, and page content are not stored.
- MCP: https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/json-check/mcp
- Official name:
io.github.sadri-dridi/json-check - Catalog: https://agent-observatory-sensor.nolimit-observatory.workers.dev/c/github/api/catalog
Comments
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