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BEAD

JSON Schema Validator

Validate any JSON value against a JSON Schema — full Draft 2020-12 support via Ajv with standard formats.

Developer
✗ 1 error
PathKeywordMessage
/tagsuniqueItemsmust NOT have duplicate items (items ## 2 and 1 are identical)
</>Use this tool programmaticallycurl · JavaScript · MCP

Same tool, callable from any HTTP client or from Claude (via MCP). Anonymous: 100 req/day per IP. Sign up for 1,000 req/day.

curl
curl https://api.b-e-a-d.com/tools/schema-validator/run \
  -H "Content-Type: application/json" \
  -d '{
  "schema": "a",
  "data": {}
}'
JavaScript (fetch)
const res = await fetch("https://api.b-e-a-d.com/tools/schema-validator/run", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
  "schema": "a",
  "data": {}
}),
});
const data = await res.json();
console.log(data.result);
MCP (Claude Desktop / Claude Code)
# In Claude Desktop / Claude Code, add to your MCP config:
{
  "mcpServers": {
    "bead": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://mcp.b-e-a-d.com"]
    }
  }
}

# Then ask Claude to call:
mcp__bead__bead_schema_validator

Full reference: developer docs · OpenAPI spec

Validation engine

Powered by ajv with the standard format suite — UUID, email, hostname, IP, date-time, URI, regex, and more. We use Draft 2020-12 by default; older drafts work too because Ajv is backward-compatible for most keywords.

What you see

Either a single “valid” line or a list of errors with their instancePath, failed keyword, and message — click the path to copy it.

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Used in these workflows