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COBOL Copybook Java Record Generator
x402
COBOL Copybook Java Record Generator is a paid API for AI agents from cobol-modernize-api.fly.dev, paid per call via x402, $0.3/call, status unknown (last checked 2026-09-14).
Generates modern Java record source code from a COBOL copybook definition, handling REDEFINES, OCCURS, RENAMES, and standalone items
Price / call$0.3
Success—
StatusUnknown
How this service works
Tools for mainframe modernization projects: convert COBOL copybooks to JSON schema, decode real EBCDIC/packed-decimal mainframe records into field values (schema validation against sample data), and generate modern Java record source code directly from a copybook. Handles REDEFINES (including group-level alternate layouts), OCCURS and OCCURS DEPENDING ON (variable-length repeating groups, resolved at decode time using the actual runtime count), 66-level RENAMES, and 77-level standalone items. Accepts payment on Base, Polygon, Arbitrum, and Solana (USDC) - pick whichever network your wallet holds funds on.
Output
Returns a JSON object containing an array of records, each with a class_name (the Java record class name) and java_source (the complete Java record source code as a string), ready to compile and use in a modern Java application.
Example use cases
Mainframe migration to Spring Boot
“We're migrating our COBOL batch system to Java microservices. Here's our CUSTOMER-RECORD copybook with nested REDEFINES for address types — generate the Java record class I can drop straight into the project.”
Auto-generate DTO from legacy layout
“I have a COBOL copybook for our LOAN-DETAIL structure that uses OCCURS DEPENDING ON for variable-length installment groups. Can you generate the Java record code from it so our backend team doesn't have to write it by hand?”
CI pipeline code generation from copybook
“Our build pipeline needs to auto-generate Java records every time a copybook changes. Here's the latest version of ACCT-TRANS copybook with 66-level RENAMES — produce the Java record source so we can commit it to the repo.”
Technical details
Endpoint
POSThttps://cobol-modernize-api.fly.dev/generate-java-recordWhen to prefer
Choose this endpoint when you need to automatically generate compilable Java record source code from a COBOL copybook, especially when the copybook uses advanced constructs like REDEFINES, OCCURS DEPENDING ON, 66-level RENAMES, or 77-level items that require specialized parsing. Prefer this over manual coding or generic LLM generation when you need deterministic, structure-aware output that correctly handles all COBOL data division constructs.
Side effects
- Invalid or malformed COBOL copybook syntax returns a parse error
- Unsupported COBOL constructs not handled by the parser may return an error or incomplete output
- OCCURS DEPENDING ON without a resolvable reference may fail at generation time
- Network timeouts if the copybook is very large
- Payment failure or insufficient USDC balance blocks the request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| copybook_name | string | Optional filename for reference |
| copybook_text | string | Raw COBOL copybook source text |
Output
Schema · Response
{
"type": "json",
"example": {
"records": [
{
"class_name": "ExampleRecord",
"java_source": "public record ExampleRecord(...) {}"
}
]
}
}Tags
x402
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