Stream by CelerFi

Category: Web3/Blockchain, AI, FinTech, DevTool

Stream by CelerFi is an open payment protocol engineered for the emerging autonomous agent economy. It fundamentally re-architects how AI agents transact for services by replacing the traditional, inefficient request-response billing model with a continuous payment channel primitive. Built on high-throughput blockchains like Solana and Base with a performant Go backend, Stream is designed for the high-frequency, long-running interactions characteristic of AI agents.

The protocol operates through cryptographically secured sessions. An agent begins by autonomously discovering a service provider via a public manifest. A session is then negotiated, and both parties lock up collateral to guarantee commitment. Once the session is active, payment flows continuously as resources are consumed, eliminating the overhead of per-request billing and human approval. This architecture is ideal for agents that delegate tasks in parallel or consume resources like computation and data over extended periods.

A core innovation is its trustless verification mechanism. Before an agent commits any funds, the service provider must prove delivery by providing a SHA-256 hash of the output. This content commitment ensures the provider cannot claim payment without delivering exactly what was promised, while the on-chain nature of the protocol ensures the payer cannot roll back a signed payment. Stream provides the critical financial infrastructure for a future where autonomous agents can securely and efficiently pay for services at the speed of computation.

Key features:

• Streaming Payments: Utilizes a payment channel primitive to enable a continuous flow of value, replacing inefficient per-transaction billing with a single, long-running session.
• Trustless Verification: Employs SHA-256 output commitments, requiring providers to cryptographically prove service delivery before an agent commits payment, eliminating fraud.
• Secured Sessions: Initiates sessions by having both the payer and provider lock up collateral, creating a secure and mutually committed environment for the transaction stream.
• Autonomous Discovery: Allows AI agents to autonomously discover and connect with service providers through a public manifest, facilitating a decentralized service economy.
• High-Performance Stack: Built on high-throughput blockchains like Solana and Base with a Go backend to process transactions at the speed required by computational agents.
• Live Monitoring: Features a live dashboard for developers to monitor active sessions, transaction flows, and overall protocol health in real-time.

Tech stack: Go, Ed25519, SHA-256, Anthropic API, Render