Designing APIs for Agents

Patrick Kelly

I keep hearing this on customer calls: "We aren't building the API for developers. We're building it for agents". These are new APIs designed specifically for agent consumption. The difference matters—agents will fail to use APIs that aren't properly designed. Sideko is proposing a cool workflow for teams building this way:

  • First, design your API surface in OpenAPI

  • Use Sideko to get a live mock server and a Python SDK

  • Create an agent toolkit

  • Give the agent tasks and measure performance in the mock environment

The immediate feedback from agents trying to use the API shapes the design and helps you iterate. All done before writing any API server code.

Scale your DevEx and Simplify Integrations

Time Saved (Automation)

Automate API connections and data flows, eliminating repetitive manual coding.

Ship Cleaner Code

Production-ready, native-quality code: clean, debuggable, custom SDK structures to your standards.

Always Up-to-Date Docs

SDKs and integrations remain consistent with API and language version updates.

Time Saved (Automation)

Automate API connections and data flows, eliminating repetitive manual coding.

Ship Cleaner Code

Production-ready, native-quality code: clean, debuggable, custom SDK structures to your standards.

Always Up-to-Date Docs

SDKs and integrations remain consistent with API and language version updates.

Time Saved (Automation)

Automate API connections and data flows, eliminating repetitive manual coding.

Ship Cleaner Code

Production-ready, native-quality code: clean, debuggable, custom SDK structures to your standards.

Always Up-to-Date Docs

SDKs and integrations remain consistent with API and language version updates.

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Copyright© 2025 Sideko, Inc. All Rights Reserved.

Copyright© 2025 Sideko, Inc. All Rights Reserved.

Copyright© 2025 Sideko, Inc.
All Rights Reserved.