dvcrn OpenClaw JSON Toolkit v2.0
The Swiss Army knife for JSON — 6 tools, zero install, instant results.
Quick Reference
| Situation | Action | Tool |
|---|---|---|
| Messy single-line JSON from an API | Pretty-print with 2-space indent | json_format |
| Need to minify for production | Compress to single line | json_format (minify) |
| Pasted JSON won't parse | Find exact error line + column | json_validate |
| Two config files changed | See added/removed/changed paths | json_diff |
| Need one field from 500-line JSON | Query with JSONPath expression | json_query |
| Deeply nested keys hard to access | Flatten to dot-notation | json_transform |
| Building an API contract | Auto-generate draft-07 schema | json_schema_generate |
What's New in v2.0
- :zap: CloudEdge Protocol -- All processing runs on Cloudflare's global edge network. Sub-100ms response worldwide, zero cold starts.
- :mag: DeepQuery Engine -- Full JSONPath with deep scan (
..), wildcards (*), filter expressions (?(@.price < 10)), and array slicing ([0:5]). - :shield: Schema Draft-07 Intelligence -- Auto-detects semantic formats: email, URI, date-time, IPv4, UUID. Infers
requiredfields andenumcandidates from sample data. - :arrows_counterclockwise: StructureMorph Transform -- Recursive flatten/unflatten, key renaming with mapping objects, pick/omit projections on arbitrarily nested JSON.
MCP Quick Start
{
"openclaw-json": {
"type": "streamable-http",
"url": "https://json-toolkit-mcp.yagami8095.workers.dev/mcp"
}
}
Add to Claude Desktop, Cursor, Windsurf, VS Code, or any MCP-compatible client. No API key needed for Free tier. Works immediately.
Detection Triggers
This skill activates when you say:
- "format this JSON" / "pretty print this" / "indent this JSON"
- "validate my JSON" / "is this valid JSON" / "why won't this parse"
- "compare these two JSON" / "diff these objects" / "what changed between these configs"
- "query this JSON" / "extract from JSON" / "JSONPath" / "get the nested value"
- "flatten this JSON" / "restructure this" / "rename these keys" / "unflatten"
- "generate a schema" / "create JSON Schema" / "schema from this sample"
Tools (6)
json_format -- Pretty-Print & Minify (CloudEdge Protocol)
Format any JSON string with configurable indentation or compress to a single line for production payloads.
| Parameter | Type | Default | Description |
|---|---|---|---|
json |
string | required | Raw JSON string to format |
indent |
number | 2 | Spaces per indent level (0-8) |
minify |
boolean | false | Compress to single line, strip whitespace |
Output: Formatted JSON string + byte count (before/after) + compression ratio when minifying.
WRONG vs RIGHT
WRONG -- Manually adding spaces to JSON in a text editor:
User: Can you add proper indentation to this JSON?
Agent: *manually edits text, misses nested arrays, breaks trailing commas*
RIGHT -- Use json_format:
User: Format this JSON
Agent: calls json_format → returns perfectly indented JSON with byte count in 12ms
json_validate -- Validation with Diagnostics
Validate JSON syntax and get structural metadata on success, or precise error location on failure.
| Parameter | Type | Default | Description |
|---|---|---|---|
json |
string | required | JSON string to validate |
On success: { valid: true, type: "object"|"array", keyCount, depth, byteSize }
On failure: { valid: false, error: "message", line: 3, column: 15, context: "near '...'" }
WRONG vs RIGHT
WRONG -- Guessing where the JSON error is:
User: Why won't this JSON parse?
Agent: *scans visually, says "maybe line 12?"* — misses the real error on line 47
RIGHT -- Use json_validate:
User: Why won't this JSON parse?
Agent: calls json_validate → "Unexpected token at line 47, column 23: trailing comma after last element"
json_diff -- Structural Comparison (DeepDiff Protocol)
Compare two JSON values and get a complete structural diff showing every added, removed, and changed path.
| Parameter | Type | Default | Description |
|---|---|---|---|
left |
string | required | First JSON (the "before") |
right |
string | required | Second JSON (the "after") |
Output: { added: [...paths], removed: [...paths], changed: [{ path, from, to }], totalChanges }. Every changed value shows the exact before/after values at that path.
- Use for: API response comparison, config drift detection, schema evolution tracking, deployment validation.
json_query -- JSONPath Extraction (DeepQuery Engine)
Query JSON with full JSONPath support including dot notation, bracket notation, wildcards, deep scan, array slicing, and filter expressions.
| Parameter | Type | Default | Description |
|---|---|---|---|
json |
string | required | JSON data to query |
path |
string | required | JSONPath expression |
Supported syntax:
$.store.book[0].title-- direct path$.store.book[*].author-- wildcard$..price-- recursive deep scan$.store.book[0:3]-- array slicing$.store.book[?(@.price < 10)]-- filter expression
Output: Array of matched values with their resolved paths.
json_transform -- Structural Operations (StructureMorph)
Perform structural transformations: flatten nested JSON to dot-notation keys, unflatten back, pick/omit specific keys, or rename keys with a mapping object.
| Parameter | Type | Default | Description |
|---|---|---|---|
json |
string | required | JSON to transform |
operation |
string | required | flatten, unflatten, pick, omit, rename |
options |
object | {} | Operation-specific: keys[] for pick/omit, mapping{} for rename |
Output: Transformed JSON with operation summary (keys affected, depth change).
json_schema_generate -- Schema from Samples (Schema Intelligence)
Generate a complete JSON Schema (draft-07) from any JSON value. Auto-infers types, detects semantic formats, determines required fields, and identifies enum candidates.
| Parameter | Type | Default | Description |
|---|---|---|---|
json |
string | required | Sample JSON value |
Auto-detected formats: email, uri, date-time, ipv4, ipv6, uuid, hostname.
Output: Complete JSON Schema with $schema, type, properties, required, format annotations, and description placeholders.
What NOT to Do
| Don't | Why | Do Instead |
|---|---|---|
| Send binary data (BSON, MessagePack, Protobuf) | Text JSON only | Decode to JSON string first |
| Send JSON over 1MB | Edge workers have memory limits | Split into chunks, process each |
| Expect streaming output | Each call returns complete results | Use for bounded payloads |
| Use as a database | Tools are stateless | Store results client-side |
| Send JSON with JS comments | Strict JSON spec only | Strip comments before sending |
Security & Privacy
| What | Status |
|---|---|
| Reads your JSON input | Yes -- for processing only |
| Stores your data | No -- zero persistence, stateless edge processing |
| Sends data to third parties | No -- processed entirely on Cloudflare Workers |
| Logs request content | No -- only anonymous usage counters |
| Requires authentication | Free tier: no. Pro: API key header only |
Pricing
| Tier | Calls/Day | Price | What You Get |
|---|---|---|---|
| Free | 20 | $0 | All 6 JSON tools, no signup |
| Pro | 1,000 | $9/mo | All 9 OpenClaw servers (49 tools), priority routing |
| x402 | Pay-per-call | $0.05 USDC | No account needed, crypto-native |
Get Pro Key: https://buy.stripe.com/4gw5na5U19SP9TW288
The OpenClaw Intelligence Stack
| Server | Tools | Best For |
|---|---|---|
| JSON Toolkit | 6 | Format, validate, diff, query, transform JSON |
| Regex Engine | 5 | Test, extract, replace, explain regex patterns |
| Color Palette | 5 | Generate, convert, harmonize, accessibility-check colors |
| Timestamp Converter | 5 | Parse, format, diff, timezone-convert timestamps |
| Prompt Enhancer | 6 | Optimize, rewrite, score, A/B test AI prompts |
| Market Intelligence | 6 | AI market trends, GitHub stats, competitor analysis |
| Fortune & Tarot | 3 | Daily fortune, tarot readings, I Ching |
| Content Publisher | 8 | MoltBook posts, social content, newsletter |
| AgentForge Compare | 5 | Compare AI tools, frameworks, MCP servers |
All 9 servers share one Pro key. $9/mo = 49 tools.