com.gumballtools/payload-validator

up checked 2026-11-11T03:39:06.865Z

Unclaimed · Unverified

Publisher-provided title

Payload Validator

Publisher-provided description

Validate JSON, YAML, XML and CSV with exact line/column errors and silent-corruption warnings.

Summary by lookupd

Validates JSON, YAML, XML and CSV payloads, reporting exact error locations and silent-corruption warnings.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http payload-validator https://payload-validator.gumballtools.com/api/mcp

Codex, remote (streamable-http)

codex mcp add payload-validator --url https://payload-validator.gumballtools.com/api/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "payload-validator": {
      "url": "https://payload-validator.gumballtools.com/api/mcp"
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Publisher-provided text

validate_json Validates a JSON document and reports every problem with an exact line and column. Use this whenever you need to know why a JSON payload is failing, or to chec
validate_yaml Validates a YAML document, including the values that mean different things to different YAML loaders. Use this for any YAML you are about to write or have just
validate_xml Validates an XML document for well-formedness, namespace correctness, and the entity-based attacks that arrive as XML. Use this before parsing XML you received
validate_csv Validates CSV text against RFC 4180 and reports ragged rows individually, with both field counts. Use this before loading a CSV, and whenever a CSV-derived num
validate_auto Detects whether a payload is JSON, YAML, XML or CSV, then validates it. Use this when you have a blob of text and do not know what it is — a file with no exten

Shows this live status and links here; updates hourly.

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