# Concordium Developer Documentation

> Technical documentation for developers building on, integrating with, or operating the Concordium blockchain. Concordium is a public, permissionless Layer 1 blockchain with a built-in identity layer, fast finality, and smart contract support.

The documentation is organized into four sections following the Diátaxis framework: Explore (concepts), Tutorials (learning by doing), How-to (task guides), and Reference (technical look-up material).

## Explore

Conceptual background and explanations of how Concordium works.

- [Concordium Protocol at a glance](https://docs.concordium.com/en/mainnet/learn/concordium-protocol.html): Overview of the Concordium blockchain and its key properties
- [Identity and privacy](https://docs.concordium.com/en/mainnet/learn/identity/index.html): How Concordium's built-in identity layer works
- [Accounts](https://docs.concordium.com/en/mainnet/learn/accounts/index.html): Account model, creation, and key management
- [Transactions](https://docs.concordium.com/en/mainnet/learn/transactions/index.html): Transaction types, fees, and sponsored transactions
- [Smart contracts](https://docs.concordium.com/en/mainnet/learn/smart-contracts/index.html): Smart contract model, modules, instances, and schema
- [Consensus](https://docs.concordium.com/en/mainnet/learn/consensus/index.html): ConcordiumBFT consensus mechanism and block production
- [Tokenomics](https://docs.concordium.com/en/mainnet/learn/tokenomics.html): CCD token, transaction fees, and rewards
- [Validation and Staking](https://docs.concordium.com/en/mainnet/learn/staking/index.html): Validators, delegation, and staking pools
- [Governance](https://docs.concordium.com/en/mainnet/learn/governance/index.html): On-chain governance and voting

## Tutorials

Step-by-step learning guides for building on Concordium.

- [Quick start guide](https://docs.concordium.com/en/mainnet/tutorials/quick-start.html): Set up your development environment and deploy your first smart contract
- [Verify and Access](https://docs.concordium.com/en/mainnet/tutorials/verify-access/index.html): Build an age verification dApp using Concordium ID
- [Using ID in dApps](https://docs.concordium.com/en/mainnet/tutorials/using-ID-in-dApps/index.html): Build a zero-knowledge proof dApp with wallet connectors
- [Smart contract sponsored transactions](https://docs.concordium.com/en/mainnet/tutorials/sponsoredTransactions/index.html): Build a sponsored transactions dApp
- [Protocol-Level Tokens](https://docs.concordium.com/en/mainnet/tutorials/plt/index.html): Work with Concordium's protocol-level token standard
- [NFT minting](https://docs.concordium.com/en/mainnet/tutorials/nft-minting/index.html): Mint and transfer NFTs on Concordium
- [Piggy bank](https://docs.concordium.com/en/mainnet/tutorials/piggy-bank/index.html): End-to-end smart contract tutorial with frontend

## How-to

Task-focused guides for completing specific goals on Concordium.

- [Implement Verify and Access](https://docs.concordium.com/en/mainnet/how-to/concordium-id/verify-and-access/index.html): Integrate Concordium ID verification into your application
- [Build a wallet with the Wallet SDK](https://docs.concordium.com/en/mainnet/how-to/integrations/wallet-sdk/wallet-sdk.html): Create identities, accounts, and submit transactions
- [Integrate Concordium in a crypto wallet](https://docs.concordium.com/en/mainnet/how-to/integrations/wallet-integration/wallet-integration.html): Add Concordium support to an existing wallet
- [Implement Web3 ID](https://docs.concordium.com/en/mainnet/how-to/web3-id/index.html): Issue and verify Web3 ID credentials
- [Run a Concordium node](https://docs.concordium.com/en/mainnet/how-to/nodes/node-requirements.html): Set up and operate a node on Ubuntu, macOS, Windows, or Docker
- [Set up smart contract development tools](https://docs.concordium.com/en/mainnet/how-to/smart-contracts/build-contract.html): Install cargo-concordium and set up your environment
- [Deploy a smart contract module](https://docs.concordium.com/en/mainnet/how-to/smart-contracts/deploy-module.html): Deploy, initialize, and interact with smart contracts
- [Become a validator](https://docs.concordium.com/en/mainnet/how-to/infrastructure/become-validator.html): Set up a validator node using the Concordium Client
- [Navigate this documentation](https://docs.concordium.com/en/mainnet/how-to/navigate-docs.html): Guide to how the documentation is organized

## Reference

Technical specifications, APIs, tools, and release notes.

- [gRPC API v2](https://developer.concordium.software/concordium-grpc-api/#v2%2fconcordium%2fservice.proto): Full gRPC API reference
- [Rust SDK](https://docs.rs/concordium-rust-sdk/latest/concordium_rust_sdk/): Concordium Rust SDK API reference
- [Concordium Client](https://docs.concordium.com/en/mainnet/technical-reference/concordium-client/concordium-client.html): Command-line tool for interacting with the Concordium blockchain
- [CCDScan](https://docs.concordium.com/en/mainnet/technical-reference/ccd-scan/ccd-scan.html): Blockchain explorer documentation
- [Smart contract references](https://docs.concordium.com/en/mainnet/technical-reference/smart-contracts/references-on-chain.html): On-chain references, host functions, and schema format
- [Glossary of Concordium terms](https://docs.concordium.com/en/mainnet/technical-reference/glossary.html): Definitions of key terms used across the documentation
- [Release notes](https://docs.concordium.com/en/mainnet/technical-reference/release-notes.html): Node and tool release history
- [Downloads](https://docs.concordium.com/en/mainnet/downloads.html): Wallets, node software, and tools

## Agent Registry

On-chain identity and discovery for AI agents.

- [Use the Agent Registry](https://docs.concordium.com/en/mainnet/how-to/integrations/agent-registry.html): Register an agent, link an Ethereum address, and publish a verifiable Agent Card
- [CIS-8004: Agent Registry standard](https://docs.concordium.com/en/mainnet/technical-reference/agent-registry/cis-8004.html): CIS-8004 contract specification — token model, entrypoints, and external references
- [CIS-8: External Key Registry standard](https://docs.concordium.com/en/mainnet/technical-reference/agent-registry/cis-8.html): CIS-8 contract specification — cross-chain key bindings and proof schemes
- [Agent Card format](https://docs.concordium.com/en/mainnet/technical-reference/agent-registry/agent-card.html): Agent Card JSON structure, Concordium extension block, and card verification
- [Concordium Badge](https://docs.concordium.com/en/mainnet/technical-reference/agent-registry/concordium-badge.html): Badge string format (token address, CAIP-19), trustless resolution and verification, and embedding guidance
- [MCP service](https://docs.concordium.com/en/mainnet/technical-reference/agent-registry/mcp-service.html): Model Context Protocol server — hosted endpoint, local setup, and all available tools
- [Indexer](https://docs.concordium.com/en/mainnet/technical-reference/agent-registry/indexer.html): Event indexer for agent discovery — setup, REST API, and sync state

## Optional

- [Onboard as an exchange](https://docs.concordium.com/en/mainnet/how-to/integrations/exchange-onboarding.html): Integration guide for cryptocurrency exchanges
- [Implement X402 payments](https://docs.concordium.com/en/mainnet/how-to/integrations/x402-integration.html): Add HTTP 402 payment support
- [Election coordinator](https://docs.concordium.com/en/mainnet/technical-reference/coordinator.html): Governance election coordinator reference
- [ID layer references](https://docs.concordium.com/en/mainnet/technical-reference/id-attributes-reference.html): Identity attribute reference and identity provider interfaces
- [dApp examples](https://docs.concordium.com/en/mainnet/tutorials/daap-examples/dapp-examples.html): Collection of example dApps built on Concordium