# Open Solid

> Open Solid is banking infrastructure for AI agents. A wallet, cards, bank accounts and paid-API access, so your agent can earn revenue, spend it on growth, and run a business of its own.

Open Solid is for agents that operate with real money: earn revenue into a bank account and wallet they control, pay for software, ads and paid APIs, pay people, and reinvest. Money movement is provided by Laso Finance, a FinCEN-registered MSB; during the preview the API base is https://laso.finance and the MCP server is https://laso.finance/mcp.

## Start here (agents)

- [SKILL.md](https://opensolid.ai/SKILL.md): Connect, persist credentials, and the reference to load for each task. Save it to your skills directory.
- [Full docs in one file](https://opensolid.ai/llms-full.txt)
- [OpenAPI 3.1](https://laso.finance/openapi.json): Every route, parameter, response and price.
- [Pricing](https://laso.finance/get-pricing): Every product's fee and limits, no auth.

## Get started

- [Introduction](https://opensolid.ai/docs/introduction.md): Open Solid is banking infrastructure for AI agents that build and run their own companies.
- [Quickstart](https://opensolid.ai/docs/quickstart.md): Connect an agent to Open Solid, fund its wallet, and make the first call.
- [Core concepts](https://opensolid.ai/docs/concepts.md): The five words that appear throughout the Open Solid docs, and what they always mean.

## Run a company

- [The founder loop](https://opensolid.ai/docs/founder-loop.md): The recipe for an agent that earns revenue, spends it on growth, and reinvests what is left.
- [Earning revenue](https://opensolid.ai/docs/earning.md): The ways an agent on Open Solid gets paid, and how revenue reaches the wallet.
- [Spending on growth](https://opensolid.ai/docs/growth-spend.md): How an agent pays for ads, creative tools and software from its own wallet.

## Money movement

- [Agent wallet](https://opensolid.ai/docs/wallet.md): The managed USDC wallet every Open Solid agent spends from, on Solana and Base.
- [Cards](https://opensolid.ai/docs/cards.md): Reloadable cards for ads and subscriptions, and prepaid cards for one-off checkouts.
- [Payouts](https://opensolid.ai/docs/payouts.md): Pay contractors and partners from the agent's wallet by debit card, bank transfer, Venmo or PayPal.
- [Bank accounts](https://opensolid.ai/docs/banking.md): Give an agent real US banking rails. Dollars in become USDC; USDC out becomes dollars.
- [Paying any x402 API](https://opensolid.ai/docs/paid-apis.md): Pay third-party x402 endpoints from the agent wallet, with the price, asset, network and receiver pinned.

## Controls

- [Spend limits and guardrails](https://opensolid.ai/docs/guardrails.md): The controls that keep an autonomous agent inside the budget its owner set.
- [Human in the loop](https://opensolid.ai/docs/human-in-the-loop.md): The few steps that always belong to the account owner, and how an agent hands them over.

## Connect

- [SKILL.md and llms.txt](https://opensolid.ai/docs/agent-discovery.md): The machine-readable files an agent reads to onboard itself to Open Solid.
- [MCP server](https://opensolid.ai/docs/mcp.md): Every Open Solid route as an MCP tool, generated from the live API.
- [API reference](https://opensolid.ai/docs/api-reference.md): Every Open Solid route grouped by job, with price and auth.

## Case studies

- [Room for Baby](https://opensolid.ai/case-studies/room-for-baby): A 3D nursery planner conceived, shipped and marketed by an agent on Open Solid.