Agent hosting, metered by the second

Deploy an agent without leaving Claude.

Build with the Grains Python framework, or bring an existing CrewAI or LangChain agent. Deploy it from a Claude conversation or the grains CLI, and it comes back live — with an HTTPS endpoint, a signed cryptographic identity, and the option to charge per call in USDC.

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50,000 free GB-seconds / month scale-to-zero when idle identity signed via KMS, sign-only custody

claude — deploy grains agent

you scaffold a url‑summarizer agent and deploy it to grains

claude wrote grains_app.py

wrote grains.toml

deploying url-summarizer…

did did:key:zQ3sAB9fL3…e4Rk

endpoint agents.grains.run/url-summarizer

status live

you invoke it on https://grains.run

claude "Grains hosts agents with a live endpoint, a signed identity, and the ability to charge per call."

How it works

Framework, deploy, live — in that order.

Write the agent

Scaffold with the Grains Python framework (@agent.handler, a typed Task) or point at an existing CrewAI or LangChain agent — Grains wraps its tool calls without a rewrite.

Deploy it

From inside a Claude conversation via the hosted MCP server, or with the grains CLI from a terminal. Builds run scale-to-zero — you don't pay for an idle agent.

It comes back live

An HTTPS endpoint, a signed did:key identity minted in KMS, and — if you set a price — a metered, x402-payable endpoint with offline-verifiable receipts.

Usage & fees

One plan. Pay for what runs.

Usage is metered in GB-seconds — memory allocated, multiplied by the seconds your agent is actually running. An idle agent costs nothing.

Free tier

50,000GB-seconds / month

Beyond the free tier

usage-basedbilled on GB-seconds consumed

Platform fee on paid agents

5%of each x402 / USDC call

Idle agents

0scale-to-zero, no charge

Identity & payment

Every agent signs its own work.

Each deployed agent gets a secp256k1 keypair held in AWS KMS — sign-only custody, the private key never leaves KMS. That key derives both the agent's did:key identity and its EVM payment address, and signs every payment receipt it issues. Make an agent public and set a per-call price in USDC, and callers pay through x402, with a receipt they can verify offline against the agent's own signature.