Payload Validator

Name: Payload Validator
Author: com.gumballtools

MCP serverMCP

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

Listed on its own since 2026-09-27. Until then it was part of cron-translator, where its earlier checks remain.

by com.gumballtoolsrepository ↗homepage ↗v0.1.0

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Observed by Wellknown

Evidence

Everything here was measured by our prober or read from a registry. Nothing is self-reported.

30-day availability47/47 checks ok

when	check	result	http	latency	detail
5 h ago	mcp initialize	ok	200	177 ms	server payload-validator 0.1.0 · protocol 2025-06-18 · 5 tools
11 h ago	mcp initialize	ok	200	155 ms	server payload-validator 0.1.0 · protocol 2025-06-18 · 5 tools
18 h ago	mcp initialize	ok	200	156 ms	server payload-validator 0.1.0 · protocol 2025-06-18 · 5 tools
25 h ago	mcp initialize	ok	200	160 ms	server payload-validator 0.1.0 · protocol 2025-06-18 · 5 tools
31 h ago	mcp initialize	ok	200	167 ms	server payload-validator 0.1.0 · protocol 2025-06-18 · 5 tools
2 d ago	mcp initialize	ok	200	176 ms	server payload-validator 0.1.0 · protocol 2025-06-18 · 5 tools
2 d ago	mcp initialize	ok	200	164 ms	server payload-validator 0.1.0 · protocol 2025-06-18 · 5 tools
2 d ago	mcp initialize	ok	200	241 ms	server payload-validator 0.1.0 · protocol 2025-06-18 · 5 tools
2 d ago	mcp initialize	ok	200	177 ms	server payload-validator 0.1.0 · protocol 2025-06-18 · 5 tools
3 d ago	mcp initialize	ok	200	203 ms	server payload-validator 0.1.0 · protocol 2025-06-18 · 5 tools

Tools observed via MCP handshake

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

Declared by sources

What the publisher says

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No long description beyond the summary.

kind Official MCP Registry

name Official MCP Registry

repoUrl Official MCP Registry

summary Official MCP Registry

version Official MCP Registry

description Official MCP Registry

homepageUrl Official MCP Registry

publisherName Official MCP Registry

Provenance

Where this record came from

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Official MCP Registrycom.gumballtools/payload-validator

first seen 1 mo ago · fetched 17 h agoopen ↗

Field history (7 recent events)

13 d ago · declared · summary → "Validate JSON, YAML, XML and CSV with exact line/column errors and silent-corruption warnings."
13 d ago · declared · description → "Validate JSON, YAML, XML and CSV with exact line/column errors and silent-corruption warnings."
13 d ago · declared · publisherName → "com.gumballtools"
13 d ago · declared · homepageUrl → "https://payload-validator.gumballtools.com"
13 d ago · declared · repoUrl → "https://github.com/bwalvoord/gumball"
13 d ago · declared · version → "0.1.0"
13 d ago · declared · protocols → ["mcp"]

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Evidence

What the publisher says

Capabilities

Where this record came from