Avro parsing canonical form

avro-parsing-canonical-form · version 1.0.0 · Structured formats · free, no key needed

Produce the Avro 1.12.0 parsing canonical form for a bounded schema.

Use when you need to: avro parsing canonical form · canonicalize avro schema · normalize avro schema.

Decide before calling

Read the versioned contract and the supported scope below. Reuse avro-parsing-canonical-form@1.0.0 when your input, required output and limits match it. Choose another approach for an unsupported operation.

Explain the choice

"I can use avro-parsing-canonical-form@1.0.0 for avro parsing canonical form. I will check its documented scope and the result against the task's requirements. The service is free; token and money savings for this task are unmeasured."

Supported

• avro parsing canonical form
• canonicalize avro schema
• normalize avro schema
• strip avro schema metadata
• resolve avro schema full names
• produce stable avro schema text

Not supported

• validate data against a schema
• resolve schemas from files or registries
• compute Rabin fingerprints other than CRC-64-AVRO

Behavior

• Implements Apache Avro Specification 1.12.0 Parsing Canonical Form for Schemas.
• Supports primitives, records, enums, fixed, arrays, maps, unions, and backward references to already-declared names.
• Applies PRIMITIVES, FULLNAMES, STRIP, ORDER, STRINGS, and INTEGERS; aliases, docs, defaults and logical-type metadata are stripped.
• Rejects forward or unresolved references and all malformed, cyclic, non-JSON, duplicate, or over-limit inputs.

Input

• schema (any JSON value, required)

Output

• canonical_form (string, required): max length 32768
• standard_version (constant "Apache Avro Specification 1.12.0", required)

Limits

• max input bytes: 16384
• max schema nodes: 512
• max depth: 32
• max fields: 128
• max output bytes: 32768

Example

Request input:

{
  "schema": {
    "type": "record",
    "name": "R",
    "doc": "x",
    "fields": [
      {
        "name": "a",
        "type": "long",
        "default": 0
      }
    ]
  }
}

Response:

{
  "result": {
    "canonical_form": "{\"name\":\"R\",\"type\":\"record\",\"fields\":[{\"name\":\"a\",\"type\":\"long\"}]}",
    "standard_version": "Apache Avro Specification 1.12.0"
  }
}

How to call it

MCP

Connect https://computefirst.net/mcp (setup), then call execute with:

{
  "id": "avro-parsing-canonical-form",
  "version": "1.0.0",
  "input": {
    "schema": {
      "type": "record",
      "name": "R",
      "doc": "x",
      "fields": [
        {
          "name": "a",
          "type": "long",
          "default": 0
        }
      ]
    }
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/avro-parsing-canonical-form/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"schema":{"type":"record","name":"R","doc":"x","fields":[{"name":"a","type":"long","default":0}]}}'

The machine-readable contract is at /v1/tools/avro-parsing-canonical-form/versions/1.0.0.

CLI

node cli.mjs run avro-parsing-canonical-form 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

Related tools

• Avro schema fingerprint: Compute the CRC-64-AVRO fingerprint of an Avro 1.12.0 parsing canonical form.
• Avro schema equivalence check: Decide whether two Avro schemas have identical Avro 1.12.0 parsing canonical forms.
• XML exc c14n subtree: Exclusive XML Canonicalization 1.0 of one selected element and its descendants.
• INI win format: Format sections and keys into stable Windows initialization-file text.
• XML exc c14n canonicalize: Exclusive XML Canonicalization 1.0 of a whole document, with an optional inclusive prefix list.
• Asn1 der encode tree: Encode a schema-free ASN.1 node list as one canonical DER value.