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from $3.00 / 1,000 json contract checks

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JSON Contract Guard MCP

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Validate agent JSON against JSON Schema and return deterministic repairs as RFC 6902 patches.

Pricing

from $3.00 / 1,000 json contract checks

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6 days ago

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Tools

validate_json: compiles the supplied JSON Schema and returns bounded machine-readable errors.
repair_json: applies optional defaults, type coercion and additional-property removal to a clone, then returns an RFC 6902 patch.

The original input is never mutated. Repair is deterministic and must still be reviewed before high-impact actions. Connect at /mcp. Pricing is $0.003 per completed tool call.

JSON Schema Batch Validator

junipr/json-schema-batch-validator

Validate JSON/JSONL batches against JSON Schema and return row-level validation errors and summaries.

junipr

JSON Validator & Schema Checker

aetheragent/json-validator-formatter

Validate, format, and analyze JSON data. Check JSON syntax, validate against a JSON schema, count objects/arrays, identify data types, find duplicate keys, and pretty-print minified JSON. Essential for developers, API integration testing, and data quality assurance.

Grant Mitchell

Validate Dataset(s) with JSON Schema

jaroslavhejlek/validate-dataset-with-json-schema

This Actor validates items in one or more datasets against a provided JSON Schema. Use it if you planning to add a dataset validation schema to your actor and you want test it.

Jaroslav Hejlek

Structured Data Extractor — URL to JSON

shelvick/structured-extractor

Extract structured data from a batch of URLs as schema-validated JSON. Send web pages and a JSON Schema; it scrapes each (stealth + residential proxy as needed), runs an LLM to convert the page to JSON matching your schema, and validates per URL. Omit schema for best-effort. Public pages only.

Scott Helvick

JSON Schema Validator & Generator — Infer, Validate & Document

perryay/json-schema-validator-generator

Infer JSON Schema from sample JSON data and validate JSON documents against existing schemas. Supports Draft-04, Draft-07, and 2019-09. Features nested objects, array item type inference, enum detection, batch validation, and human-readable schema documentation generation.

Perry AY

RFC Editor Index Scraper

parseforge/rfc-editor-scraper

Export RFC documents from the RFC Editor index. Query 9,000+ Internet standards by RFC number, status, stream, or title keyword. Pull title, authors, status, stream, publish date, abstract, format URLs, obsoletes, updates.

ParseForge

RFC-to-Changelog Generator

c4m3r0n808/rfc-to-changelog

Turn IETF RFC numbers into plain-English summaries your team can actually use. Extracts title, abstract, section map, and what each RFC obsoletes or updates, straight from rfc-editor.org. Built for network engineers and DevOps who track protocol changes without reading 80-page specs.

Cameron Stanley

CSV to JSON Converter with Schema Inference & Validation

nibble/csv-json-schema-converter

Convert CSV files to clean, typed JSON. Auto-detects delimiter, infers a JSON Schema, and validates rows against your own schema. Ideal for APIs, data pipelines and AI agents.

Simon Fletcher

MCP Tool Schema Validator

junipr/mcp-tool-schema-validator

Validate MCP tool schemas and manifests for agent-readiness, input/output clarity, and common schema mistakes.

junipr

JSON Schema - Infer, Validate, TypeScript

lazymac/json-schema-api

🔥 7-DAY LAUNCH SPRINT (May 1–8, 2026): First 100 runs free for new users. JSON Schema toolkit: automatically infer schemas from JSON data, validate documents against schemas, and generate TypeScript type definitions. Essential for API development and data validation workflows.