How do I install JSON Validator API?

Copy the http config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does JSON Validator API need an API key?

No required environment variable is listed on this record.

What transport does JSON Validator API use?

JSON Validator API is reached over HTTP.

JSON Validator API

by io.github.Br0ski777

JSON syntax validation, JSON Schema checking, structure stats. x402 micropayment.

Power your agent

Add this server

The publisher's own URL. Not a PlugMCP endpoint.

Server URL

https://json-validator.api.klymax402.com/mcp

Provider

Add in Claude

Claude opens with the name and URL filled in. You still confirm it there.

Claude Code

claude mcp add --transport http io.github.br0ski777-json-validator https://json-validator.api.klymax402.com/mcp

Run in a terminal.

Claude Desktop

{
  "mcpServers": {
    "io.github.br0ski777-json-validator": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://json-validator.api.klymax402.com/mcp"
      ]
    }
  }
}

claude_desktop_config.json

Step-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

Related MCP

Related skills

View all

Questions

How do I install JSON Validator API?: Copy the http config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.
Does JSON Validator API need an API key?: No required environment variable is listed on this record.
What transport does JSON Validator API use?: JSON Validator API is reached over HTTP.
When was JSON Validator API last checked?: Last checked 2026-10-16. JSON syntax validation, JSON Schema checking, structure stats. x402 micropayment.

JSON Validator API

JSON validator with optional JSON Schema validation and structure stats. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "json-validator": {
      "url": "https://json-validator.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl -X POST "https://json-validator.api.klymax402.com/api/validate" \
  -H "Content-Type: application/json" \
  -d '{"json":"..."}'
# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

Tool	Method	Path	Price	Description
`data_validate_json`	POST	`/api/validate`	$0.003	Validate JSON and optionally check against a JSON Schema

`data_validate_json`

Use this when you need to validate JSON syntax or validate JSON data against a JSON Schema. Returns validity status, parse errors, formatted JSON, and structure stats (depth, key count, arrays, total size). Do NOT use for password checking — use security_check_password. Do NOT use for hash generation — use crypto_generate_hash. Do NOT use for cron expressions — use util_parse_cron.

Parameters

Name	Type	Required	Description
`json`	string	yes	JSON string to validate
`schema`	object	no	Optional JSON Schema to validate against

Example agent prompts

"Validate JSON syntax or validate JSON data against a JSON Schema"

Payment

Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
Network: Base L2 (eip155:8453)
Asset: USDC
Facilitator: Coinbase CDP (primary), PayAI (fallback)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

Catalog: https://klymax402.com/llms.txt
Full API reference: https://klymax402.com/llms-full.txt
Live stats: https://klymax402.com/stats

License

MIT

JSON Validator API

by io.github.Br0ski777

JSON syntax validation, JSON Schema checking, structure stats. x402 micropayment.

Power your agent

Add this server

The publisher's own URL. Not a PlugMCP endpoint.

Server URL

https://json-validator.api.klymax402.com/mcp

Provider

Add in Claude

Claude opens with the name and URL filled in. You still confirm it there.

Claude Code

claude mcp add --transport http io.github.br0ski777-json-validator https://json-validator.api.klymax402.com/mcp

Run in a terminal.

Claude Desktop

{
  "mcpServers": {
    "io.github.br0ski777-json-validator": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://json-validator.api.klymax402.com/mcp"
      ]
    }
  }
}

claude_desktop_config.json

Step-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

Related MCP

Related skills

View all

Questions

How do I install JSON Validator API?: Copy the http config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.
Does JSON Validator API need an API key?: No required environment variable is listed on this record.
What transport does JSON Validator API use?: JSON Validator API is reached over HTTP.
When was JSON Validator API last checked?: Last checked 2026-10-16. JSON syntax validation, JSON Schema checking, structure stats. x402 micropayment.

JSON Validator API

JSON validator with optional JSON Schema validation and structure stats. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "json-validator": {
      "url": "https://json-validator.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl -X POST "https://json-validator.api.klymax402.com/api/validate" \
  -H "Content-Type: application/json" \
  -d '{"json":"..."}'
# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

Tool	Method	Path	Price	Description
`data_validate_json`	POST	`/api/validate`	$0.003	Validate JSON and optionally check against a JSON Schema

`data_validate_json`

Parameters

Name	Type	Required	Description
`json`	string	yes	JSON string to validate
`schema`	object	no	Optional JSON Schema to validate against

Example agent prompts

"Validate JSON syntax or validate JSON data against a JSON Schema"

Payment

Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
Network: Base L2 (eip155:8453)
Asset: USDC
Facilitator: Coinbase CDP (primary), PayAI (fallback)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

Catalog: https://klymax402.com/llms.txt
Full API reference: https://klymax402.com/llms-full.txt
Live stats: https://klymax402.com/stats

License

MIT