JSONShelf
Deterministic JSON repair, validate, example-gen, schema-coerce for agents. Zero LLM, sub-10ms.
Should I use this
Quality & Safety
Findings (2)
- LOWTool 'jsonshelf_repair' description lacks action verbin jsonshelf_repair
- LOWTool 'jsonshelf_coerce' description lacks action verbin jsonshelf_coerce
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"jsonshelf": {
"url": "https://jsonshelf.vercel.app/mcp"
}
}
}Remote endpoints
https://jsonshelf.vercel.app/mcpstreamable-httpWhat it can do
Tool inventory
Tools (4)
⚪jsonshelf_repair(input, schema, mode)
Repair malformed JSON. Returns valid JSON plus a diff of what was fixed.
Input Schema
{
"type": "object",
"properties": {
"input": {
"type": "string",
"description": "Malformed JSON as a string."
},
"schema": {
"type": "object",
"description": "Optional JSON Schema to conform the output to."
},
"mode": {
"type": "string",
"enum": [
"strict",
"coerce"
],
"default": "strict"
}
},
"required": [
"input"
]
}⚪jsonshelf_validate(input, schema)
Validate JSON against a schema. Returns structured errors with JSON Pointer paths and remedies.
Input Schema
{
"type": "object",
"properties": {
"input": {},
"schema": {
"type": "object"
}
},
"required": [
"input",
"schema"
]
}⚪jsonshelf_example(schema)
Generate a minimal valid example matching a JSON schema.
Input Schema
{
"type": "object",
"properties": {
"schema": {
"type": "object"
}
},
"required": [
"schema"
]
}⚪jsonshelf_coerce(input, schema)
Soft-cast values to match a schema (string "42" → 42 for integer fields, etc.).
Input Schema
{
"type": "object",
"properties": {
"input": {},
"schema": {
"type": "object"
}
},
"required": [
"input",
"schema"
]
}Community
Evidence