Best APIs for AI Agents in 2026
APIs now specialize in agent workflows: web extraction, social publishing, model cost control, and private inference. The 2026 leaders focus on narrow, reliable endpoints instead of broad platforms. These products show builders trading generality for speed and domain fit.
Updated 2026-07-24 · 12 products · live data from stgame
1. Context.dev1.1k upvotes
Context.dev gives agent teams one call to scrape, enrich, and structure live web data.
2. ExploreYC877 upvotes
ExploreYC delivers open YC and a16z company data for agents that need verified startup signals.
3. Plurai805 upvotes
Plurai lets teams train evals and guardrails on their exact agent use cases instead of generic benchmarks.
4. Publora691 upvotes
Publora lets agents publish to ten social platforms through a single posting API.
5. Auriko 685 upvotes
Auriko functions as a trading desk that routes and optimizes LLM calls like financial trades.
6. Anything API670 upvotes
Anything API turns any website into a structured endpoint without custom scrapers.
7. Oxlo.ai564 upvotes
Oxlo.ai routes across models while capping spend, useful for teams running high-volume agents.
8. Humalike x Hermes463 upvotes
Humalike x Hermes adds social intelligence directly into Hermes agents via a plugin.
9. Zro417 upvotes
Zro provides private inference so coding agents never send code to third-party models.
10. FetchSandbox384 upvotes
FetchSandbox remembers past failures during API integration testing for agents.
11. Opper AI229 upvotes
Opper AI serves as the European gateway for agents that need regional compliance and routing.
12. Link Preview API174 upvotes
Link Preview API supplies fast Open Graph, title, and image data for any URL agents encounter.
How to choose
Match the API to the narrow job: data extraction, social output, cost routing, or private inference. Check real usage metrics and uptime claims rather than marketing promises. Watch for hidden per-call pricing that scales with agent volume and avoid tools that force you into their model ecosystem. Test integration friction early since most agent stacks break on brittle third-party endpoints.
FAQ
Which API should I use to let agents post on multiple social platforms?
Publora handles posting across ten platforms through one API designed for agents.
How do I keep LLM costs down when running many agents?
Oxlo.ai and Auriko both focus on routing and trading calls to control spend without changing models.
What options exist for private inference in coding agents?
Zro specializes in private inference so code never leaves your environment.