# Fast ## Fast - [Welcome to Fast](https://docs.fast.xyz/readme.md) - [Overview](https://docs.fast.xyz/sdk-references/overview.md) - [Core SDK Execution](https://docs.fast.xyz/sdk-references/core-sdk-execution.md): The foundation layer for account-to-account operations - [fast-sdk](https://docs.fast.xyz/sdk-references/core-sdk-execution/fast-sdk.md): Fast SDK (@fastxyz/sdk) — TypeScript SDK for building on the Fast payment network. Provides FastProvider, Signer, and TransactionBuilder for transactions, account queries, and token management. - [allset-sdk](https://docs.fast.xyz/sdk-references/core-sdk-execution/allset-sdk.md): AllSet SDK (@fastxyz/allset-sdk) — TypeScript SDK for bridging tokens between Fast and EVM chains. Provides deposit (EVM → Fast), withdraw (Fast → EVM), and custom intent execution. - [Payment Protocol Adapters](https://docs.fast.xyz/sdk-references/payment-protocol-adapters.md): Standardized protocols for entity-to-entity payment flows. - [x402-sdk](https://docs.fast.xyz/sdk-references/payment-protocol-adapters/x402-sdk.md): TypeScript SDK for the x402 HTTP payment protocol — add crypto payments to any API. - [x402-client](https://docs.fast.xyz/sdk-references/payment-protocol-adapters/x402-sdk/x402-client.md): x402 Client SDK (@fastxyz/x402-client) — pays for HTTP resources protected by the x402 payment protocol. - [x402-server](https://docs.fast.xyz/sdk-references/payment-protocol-adapters/x402-sdk/x402-server.md): x402 Server SDK (@fastxyz/x402-server) — middleware for protecting HTTP resources with x402 payment requirements. - [x402-facilitator](https://docs.fast.xyz/sdk-references/payment-protocol-adapters/x402-sdk/x402-facilitator.md): x402 Facilitator (@fastxyz/x402-facilitator) — verifies and settles x402 payments for supported Fast and EVM flows. - [Funding Abstraction](https://docs.fast.xyz/sdk-references/funding-abstraction.md): On-ramps and off-ramps for getting money into and out of Fast. - [Swapper On-ramp](https://docs.fast.xyz/sdk-references/funding-abstraction/swapper-on-ramp.md) - [REST API](https://docs.fast.xyz/api-reference/rest-api.md) - [Transactions](https://docs.fast.xyz/api-reference/rest-api/transactions.md) - [Accounts](https://docs.fast.xyz/api-reference/rest-api/accounts.md) - [Tokens](https://docs.fast.xyz/api-reference/rest-api/tokens.md) - [Certificates](https://docs.fast.xyz/api-reference/rest-api/certificates.md) - [Escrow](https://docs.fast.xyz/api-reference/rest-api/escrow.md) - [Models](https://docs.fast.xyz/api-reference/rest-api/models.md) - [JSON-RPC API](https://docs.fast.xyz/api-reference/json-rpc-api.md) - [FastSet Protocol](https://docs.fast.xyz/advanced/fastset-protocol.md) - [AllSet Portal](https://docs.fast.xyz/advanced/allset-layer.md) - [AllSet Services Prometheus Metrics](https://docs.fast.xyz/advanced/allset-services-prometheus-metrics.md) - [K Framework and Formal Verification](https://docs.fast.xyz/advanced/k-framework-and-formal-verification.md) - [FAQ](https://docs.fast.xyz/faq.md) - [Legal](https://docs.fast.xyz/legal.md) - [Quickstart](https://docs.fast.xyz/get-started-archived/quickstart.md): Add payments to your AI agent in under 2 minutes. - [Core Concepts](https://docs.fast.xyz/get-started-archived/core-concepts.md) - [Use Cases](https://docs.fast.xyz/get-started-archived/use-cases.md) - [Overview](https://docs.fast.xyz/fast-archived/overview.md) - [Core Concepts](https://docs.fast.xyz/fast-archived/core-concepts.md) - [Claims](https://docs.fast.xyz/fast-archived/core-concepts/claims.md) - [Accounts](https://docs.fast.xyz/fast-archived/core-concepts/accounts.md) - [Weak Independence](https://docs.fast.xyz/fast-archived/core-concepts/weak-independence.md) - [Fast Protocol](https://docs.fast.xyz/fast-archived/core-concepts/fast-protocol.md) - [Guarantees and Properties](https://docs.fast.xyz/fast-archived/guarantees-and-properties.md) - [Developers](https://docs.fast.xyz/fast-archived/developers.md) - [Tutorials](https://docs.fast.xyz/fast-archived/developers/tutorials.md) - [Create an account](https://docs.fast.xyz/fast-archived/developers/tutorials/create-an-account.md) - [Fetch next nonce](https://docs.fast.xyz/fast-archived/developers/tutorials/fetch-next-nonce.md) - [Sign a transaction](https://docs.fast.xyz/fast-archived/developers/tutorials/sign-a-transaction.md) - [Fund account from faucet](https://docs.fast.xyz/fast-archived/developers/tutorials/fund-account-from-faucet.md) - [Submit a transaction to proxy](https://docs.fast.xyz/fast-archived/developers/tutorials/submit-a-transaction-to-proxy.md) - [Fast API](https://docs.fast.xyz/fast-archived/developers/fast-api.md) - [Validator API](https://docs.fast.xyz/fast-archived/developers/fast-api/validator-api.md) - [Proxy API](https://docs.fast.xyz/fast-archived/developers/fast-api/proxy-api.md) - [Data types](https://docs.fast.xyz/fast-archived/developers/fast-api/data-types.md) - [RPC Endpoints](https://docs.fast.xyz/fast-archived/developers/rpc-endpoints.md) - [Applications](https://docs.fast.xyz/fast-archived/applications.md) - [Block Verification Explorer](https://docs.fast.xyz/fast-archived/applications/block-verification-explorer.md) - [AllSet and AllSwap](https://docs.fast.xyz/fast-archived/applications/allset-and-allswap.md): A unified layer for cross-chain liquidity and verifiable swaps - [FAQ](https://docs.fast.xyz/fast-archived/faq.md) - [Overview](https://docs.fast.xyz/allset-archived/overview.md) - [Architecture](https://docs.fast.xyz/allset-archived/architecture.md) - [Developers](https://docs.fast.xyz/allset-archived/developers.md) - [Applications](https://docs.fast.xyz/allset-archived/applications.md) - [AllSwap](https://docs.fast.xyz/allset-archived/applications/allswap.md) - [FAQ](https://docs.fast.xyz/allset-archived/faq.md) - [Overview](https://docs.fast.xyz/k-framework-archived/overview.md) - [Formal Semantics](https://docs.fast.xyz/k-framework-archived/overview-1.md) - [LLVM-K Backend](https://docs.fast.xyz/k-framework-archived/llvm-k-backend.md) - [What is "K"? (previous)](https://docs.fast.xyz/k-framework-archived/what-is-k.md) - [Semantics-Based Compilation](https://docs.fast.xyz/k-framework-archived/further-optimizations.md) - [Overview](https://docs.fast.xyz/proof-of-proof-archived/what-is-pop.md) - [Architecture](https://docs.fast.xyz/proof-of-proof-archived/architecture.md): In this guide, we look more closely at the architecture of Proof of Proof and how it works end-to-end. - [Math Proof Generation](https://docs.fast.xyz/proof-of-proof-archived/math-proof-generation.md) - [Math Proof Checker](https://docs.fast.xyz/proof-of-proof-archived/math-proof-checker.md) - [ZK Proof Generation](https://docs.fast.xyz/proof-of-proof-archived/zk-proof-generation.md) - [Applications](https://docs.fast.xyz/proof-of-proof-archived/applications.md) - [Core technologies](https://docs.fast.xyz/proof-of-proof-archived/core-technologies.md) - [Formal Semantics & the K Framework](https://docs.fast.xyz/proof-of-proof-archived/core-technologies/formal-semantics-and-the-k-framework.md) - [Matching Logic](https://docs.fast.xyz/proof-of-proof-archived/core-technologies/matching-logic.md) - [Zero-Knowledge Proofs & zkVMs](https://docs.fast.xyz/proof-of-proof-archived/core-technologies/zero-knowledge-proofs-and-zkvms.md) --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on a page URL with the `ask` query parameter: ``` GET https://docs.fast.xyz/readme.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.