Swagger2OpenAPI Converter

Name: Swagger2OpenAPI Converter API
Brand: Swagger2OpenAPI Converter
Availability: InStock

★ Only Publicly Available OpenAPI DocumentDeveloper ToolsTesting Qanone6 EndpointsREST

For Agents

Convert Swagger 2.0 definitions to OpenAPI 3.0.x and validate OpenAPI 3.0.x specs through a hosted service.

Connect the Swagger2OpenAPI Converter to your agent

Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Swagger2OpenAPI Converter, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.

Install Jentic One Beta (Self-Hosted)

Jentic One Host machine

# On the machine that will host your Jentic One instance:
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh

Agent machine

# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh
jentic register       # connects your agent to your Jentic One instance

Jentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.

Capabilities

What an agent can do with Swagger2OpenAPI Converter API.

Convert a Swagger 2.0 definition referenced by URL into OpenAPI 3.0.x JSON

Convert a Swagger 2.0 definition supplied directly in the request body

Validate an OpenAPI 3.0.x definition referenced by URL against the schema

Validate an OpenAPI 3.0.x definition supplied in the request body and surface schema errors

GET STARTED

Start building with Swagger2OpenAPI Converter API

Explore with Jentic

View OpenAPI Document

Jentic publishes the only available OpenAPI document for Swagger2OpenAPI Converter, keeping it validated and agent-ready.

Jentic publishes the only available OpenAPI specification for Swagger2OpenAPI Converter, keeping it validated and agent-ready. Mermade's hosted Swagger2OpenAPI service converts legacy Swagger 2.0 definitions to OpenAPI 3.0.x and validates 3.0.x specs against the official schema. It accepts a definition either by URL or directly in the request body, and exposes a status check plus a shields.io-style validity badge so CI pipelines and docs sites can surface conversion and validation results without running the converter locally.

Use Cases

Patterns agents use Swagger2OpenAPI Converter API for, with concrete tasks.

★ Legacy Swagger 2.0 Migration

Teams maintaining historical Swagger 2.0 contracts can migrate them to OpenAPI 3.0.x by calling GET /convert with a URL pointing at the old definition or POST /convert with the body inline. The hosted service returns the converted JSON, ready to drop into a modern toolchain. Migrations of small APIs typically take minutes once the call is wired in.

Call POST /convert with the Swagger 2.0 JSON in the body to receive the OpenAPI 3.0.x conversion.

CI Validation of OpenAPI Specs

Build pipelines that publish OpenAPI specs can fail fast on schema regressions by calling GET /validate with the artefact URL or POST /validate with the spec in the body. The response surfaces schema-level errors so the pipeline can block a release when the contract is no longer valid.

Call POST /validate with the freshly built openapi.json in the body and fail the CI step if the response reports schema errors.

README Validity Badge

Open-source maintainers publishing OpenAPI specs in their repositories can add a hosted validity badge by linking GET /badge with the spec URL. The endpoint returns a redirect to a shields.io-style SVG that updates as the source spec changes, giving readers a quick signal of contract health.

Call GET /badge with the public spec URL and embed the resulting redirect URL in the project README.

Agent-Driven Spec Hygiene

An AI agent maintaining an internal API catalogue can use the converter to normalise newly imported specs to OpenAPI 3.0.x and validate them in the same pass. Through Jentic the agent finds the convert and validate operations, executes them, and stores the cleaned spec back in the catalogue without writing custom converter code.

Search Jentic for 'convert Swagger 2.0 to OpenAPI 3.0', execute POST /convert with the imported spec, then POST /validate on the result and write back the cleaned definition.

Key Endpoints

6 endpoints — jentic publishes the only available openapi specification for swagger2openapi converter, keeping it validated and agent-ready.

METHOD

PATH

DESCRIPTION

GET

/status

Check converter service status

GET

/convert

Convert a Swagger 2.0 URL to OpenAPI 3.0.x

POST

/convert

Convert a Swagger 2.0 body to OpenAPI 3.0.x

GET

/validate

Validate an OpenAPI 3.0.x URL

POST

/validate

Validate an OpenAPI 3.0.x body

GET

/badge

Return a redirect to a validity badge SVG

GET

/status

Check converter service status

GET

/convert

Convert a Swagger 2.0 URL to OpenAPI 3.0.x

POST

/convert

Convert a Swagger 2.0 body to OpenAPI 3.0.x

GET

/validate

Validate an OpenAPI 3.0.x URL

POST

/validate

Validate an OpenAPI 3.0.x body

Why though Jentic?

Three things that make agents converge on Jentic-routed access.

Credential isolation

The Mermade endpoint is unauthenticated, but Jentic still proxies the call so request shaping, logging, and quotas apply consistently with authenticated APIs in the same workflow.

Intent-based discovery

Agents search Jentic with intents like 'convert Swagger 2.0 to OpenAPI 3.0' and receive POST /convert with the body schema, or 'validate an OpenAPI spec' for /validate.

Time to first call

Direct integration: under a day, mostly spent on input fetching and error handling. Through Jentic: a few minutes.

Related APIs

Alternatives and complements available in the Jentic catalogue.

Complementary

Swagger Generator API

Generate client SDKs and server stubs from an OpenAPI definition

Use after converting a spec when the next step is producing client or server code from the cleaned OpenAPI 3.0 definition.

Alternative

APIMatic API

Commercial API definition transformation, validation, and code generation

Use when the team needs an enterprise SLA, support for additional spec formats (RAML, API Blueprint), or end-to-end SDK generation.

Complementary

Docker Engine API

Run validation steps in containers as part of a CI pipeline

Use when CI needs to orchestrate spec validation alongside container builds in the same pipeline.

FAQs

Specific to using Swagger2OpenAPI Converter API through Jentic.

Why is there no official OpenAPI spec for Swagger2OpenAPI Converter?

Mermade does not publish an OpenAPI specification. Jentic generates and maintains this spec so that AI agents and developers can call Swagger2OpenAPI Converter via structured tooling. It is validated against the live API and kept up to date. Get started at https://app.jentic.com/sign-up.

What authentication does the Swagger2OpenAPI Converter use?

The hosted service does not declare a security scheme; the documented endpoints are publicly callable. Through Jentic, calls are still routed through the gateway so tenants get logging and request shaping even when the upstream is unauthenticated.

Can I send the Swagger spec directly in the body instead of by URL?

Yes. POST /convert accepts the Swagger 2.0 definition in the request body and POST /validate accepts an OpenAPI 3.0.x definition the same way, which is useful when the spec is not yet published at a public URL.

What are the rate limits for the Swagger2OpenAPI Converter?

The OpenAPI spec does not declare rate limits. The hosted service is community-run on a single host, so high-volume callers should self-throttle and prefer the npm package swagger2openapi for batch jobs rather than calling the API in a tight loop.

How do I convert a Swagger 2.0 spec through Jentic?

Install the SDK with pip install jentic, search for 'convert Swagger 2.0 to OpenAPI 3.0', load the POST /convert operation, and execute it with the Swagger JSON in the body. Jentic returns the converted OpenAPI 3.0.x payload.

Does the converter return validation errors when the input is broken?

Yes. POST /validate returns a structured error response listing the schema violations found, so callers can use it to gate CI pipelines or fail a publish step when the underlying spec is invalid.