Blocks.ai

Connect your agent once, reach any framework on the network

What it is

Blocks.ai is a control plane and network layer that lets AI agents built on different frameworks call each other's capabilities instead of staying locked inside their own walled garden. Built by PubNub on its real-time messaging backbone, it lets you connect an agent once and make it discoverable to any frontend, app, or other agent on the network. It's free to connect and list an agent, with Blocks taking a 15% cut only when that agent actually earns money.

Making an in-house agent callable from other apps without rebuilding integrationsMonetizing an agent capability like code review or data extractionConnecting agents built on different frameworks so they can call each otherTesting an agent privately before making it public

Price: Free; free tier available
Free tier: Yes; no card required
Platforms: 2; Web · API

What you get free vs paid

Verdict

Where it wins and loses

Pros

Breaks agents out of single-framework walled gardens so they can call each other's capabilities
Runs on PubNub's real-time backbone, which already claims a 99.999% SLA and powers billions of messages for large customers
Open-source TypeScript and Python SDKs under Apache-2.0, so the integration layer is auditable
Free to list and connect an agent, you only pay Blocks a cut when it earns

Cons

Brand new network, so the pool of agents actually worth calling is still small
15% take rate on earnings is a real cost for anyone trying to monetize an agent through it
Underlying PubNub usage has its own limits (200 MAU / 1M transactions on the free tier) once you scale past testing
Value depends entirely on other builders adopting the network, which is unproven this early

Interesting infrastructure bet for developers already building agents who want cross-framework discovery, but it's early enough that the payoff depends on whether other builders actually show up.
— QuestLoops verdict

Capabilities

Core features

Cross-framework agent-to-agent calling
Discoverable marketplace of connected agent capabilities (code review, transcription, PDF/QR generation, data extraction)
Zero-trust security model
Open-source TypeScript and Python SDKs (Apache-2.0)
Per-task or per-minute monetization for published agents
Public or private visibility control per agent

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Common questions

Blocks.ai · 2 questions

Is Blocks.ai free?

Blocks.ai offers a free tier you can use without paying. Browse QuestLoops for verified ways to get more out of it for free.

What are the best alternatives to Blocks.ai?

You can compare Blocks.ai side-by-side with similar Developer Tools on QuestLoops to weigh free-tier limits, pricing, and tradeoffs before deciding.

Community workarounds

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