// MCP TOOL REFERENCE

ARBUILDER TOOLS

18 tools from the ARBuilder MCP Server, categorised by risk level.

// ALL 18 ARBUILDER TOOLS

READ 5 tools

Read ask_bridging Answer questions about Arbitrum bridging and cross-chain messaging using RAG. Topics: ETH/ERC20 bridging, L... Read ask_orbit Answer questions about Arbitrum Orbit chain deployment, configuration, and management. Covers chain config,... Read ask_stylus Ask questions about Stylus development, debugging, optimization, or security. Gets context-aware answers wi... Read get_stylus_context Search for relevant Stylus documentation, code examples, and patterns. Use this to find information about S... Read get_workflow Get step-by-step workflow instructions for building, deploying, or testing Stylus contracts.

WRITE 11 tools

Write generate_backend Generate a Web3 backend using NestJS or Express with viem integration for Arbitrum. Includes contract inter... Write generate_bridge_code Generate TypeScript code for bridging ETH or ERC20 tokens between L1, L2, and L3 (Orbit chains). Supports d... Write generate_frontend Generate a Next.js frontend with wagmi, RainbowKit, and DaisyUI for Arbitrum dApps. Includes wallet connect... Write generate_indexer Generate a The Graph subgraph for indexing Arbitrum smart contract events. Supports ERC20, ERC721, DeFi, an... Write generate_messaging_code Generate TypeScript code for Arbitrum cross-chain messaging. Supports L1->L2 messaging via retryable ticket... Write generate_oracle Generate Chainlink oracle integration code for Arbitrum. Supports Price Feeds, VRF (randomness), Automation... Write generate_orbit_config Generate configuration code for Orbit chain deployment. Supports chain config, AnyTrust DAC setup, and cust... Write generate_stylus_code Generate Stylus (Rust) smart contract code based on a description. Produces production-ready code using sty... Write generate_tests Generate comprehensive tests for Stylus contract code. Supports Rust native tests and Foundry Solidity tests. Write generate_validator_setup Generate code for managing Orbit chain validators, batch posters, and AnyTrust DAC keysets. Supports listin... Write orchestrate_dapp Scaffold a template-based dApp monorepo with starter components: Stylus contract, backend, frontend, indexe...

EXECUTE 2 tools

Execute orchestrate_orbit Scaffold a complete Orbit chain deployment project with all scripts, configuration, and documentation. Gene... Execute generate_orbit_deployment Generate deployment code for Orbit chains. Supports rollup deployment (createRollup), token bridge deployme...

// FAQ

How many tools does the ARBuilder MCP server have? +

The ARBuilder MCP server exposes 18 tools across 3 categories: Read, Write, Execute.

How do I enforce policies on ARBuilder tools? +

Route the ARBuilder server through the PolicyLayer gateway. Define allow, deny, or approval rules per tool in the dashboard; they are enforced on every call before it reaches the server.

What risk categories do ARBuilder tools fall into? +

ARBuilder tools are categorised as Read (5), Write (11), Execute (2). Each category has a recommended default policy.

Enforce policy on every ARBuilder tool call.

Start from ARBuilder, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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