head to head · open source
OpenAPI-Specification vs open-agent-connector
OpenAPI-Specification has 31,250 GitHub stars, 9,152 forks, 80 open issues and last shipped today. open-agent-connector has 838 stars, 321 forks, 0 open issues and last shipped yesterday. OpenAPI-Specification leads on adoption by 3,629% (31,250 vs 838 stars). OpenAPI-Specification is written in Markdown under Apache-2.0; open-agent-connector is written in Python under Apache-2.0. OpenAPI-Specification has attracted 29% as many forks as stars, open-agent-connector 38%. OpenAPI-Specification was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| OpenAPI-Specification | open-agent-connector | |
|---|---|---|
| GitHub stars | ★ 31K | ★ 838 |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Markdown | Python |
| Last push | 2026-10-14 | 2026-10-13 |
| Forks | ⑂ 9.2K | ⑂ 321 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick OpenAPI-Specification if
- You weight community size — 31K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Markdown
- You value the larger contributor base for long-term maintenance
pick open-agent-connector if
- You want the open-agent-connector feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and open-agent-connector fits your workflow better
About OpenAPI-Specification
The OpenAPI Specification (OAS) is a community driven open specification hosted within the OpenAPI Initiative, a Linux Foundation Collaborative Project. It defines a standard, programming language agnostic interface description for HTTP APIs, represented in YAML or JSON. The specification lives in the HTTP API tooling ecosystem, alongside the tools, libraries, and implementations listed in the repository's implementations document. The project source is released under the Apache 2.0 license, and its GitHub repository has accumulated roughly 31,000 stars and 9,100 forks across 13 years of activity.…
read the full OpenAPI-Specification overview →
About open-agent-connector
Open Agent Connector is an open source, self hosted integration gateway that lets AI agents discover and execute actions against app APIs over the Model Context Protocol or a REST API, built for developers who want to inspect, run, and extend their own agent integration layer.
read the full open-agent-connector overview →
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Frequently asked questions
Is OpenAPI-Specification or open-agent-connector more popular?
OpenAPI-Specification has 31,250 GitHub stars and open-agent-connector has 838. OpenAPI-Specification has the larger community by that measure.
Are OpenAPI-Specification and open-agent-connector free?
Both are open source. OpenAPI-Specification is licensed under Apache-2.0 and open-agent-connector under Apache-2.0. Neither carries a licence fee.
What is the difference between OpenAPI-Specification and open-agent-connector?
OpenAPI-Specification is written in Markdown and open-agent-connector in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, OpenAPI-Specification or open-agent-connector?
Choose OpenAPI-Specification if you want the larger community (31,250 stars) or its Apache-2.0 licence terms. Choose open-agent-connector if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.