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This page orients you to the two foundational resources for building with AdCP: the JSON schemas that define every request and response, and the SDKs that turn those schemas into typed code.

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SDKs

AdCP ships official SDKs for TypeScript, Python, and Go. Each SDK absorbs the protocol layers (wire format, signing, auth, lifecycle semantics) so you write business logic only.

TypeScript

npm install @adcp/sdk

Python

pip install adcp

Go

go get github.com/adcontextprotocol/adcp-go
For the full coverage matrix (which layers each SDK ships today), version pinning guidance, and package export details, see Choose your SDK. For the layered model behind the SDKs — what L0 through L4 each contain and why SDKs matter more in AdCP than in simpler protocols — see the SDK stack reference.

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Schema URLs

AdCP schemas are published at https://adcontextprotocol.org/schemas/ under the current major-version alias: Schemas cover every task’s request and response, shared enums, governance objects, creative formats, and signal definitions. Use the current major-version URL in production and CI so links stay stable across major releases. For how wire-level adcp_protocol_version relates to schema bundle versions, and why those are different things, see Versioning & governance.

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Authorization in adagents.json

Publishers declare their agent endpoints and authorization scopes in adagents.json. The schema supports six authorization types — property_ids, property_tags, inline_properties, publisher_properties, signal_ids, and signal_tags — each scoping which inventory the agent is authorized to act on. For the full authorization type reference and worked examples, see Authorization Patterns in the governance docs.

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Where to go next

Choose your SDK

Coverage matrix, install commands, and version pinning for each language.

Build an agent

Skill files and step-by-step guide for building a seller agent.

Build a caller

Buyer-side reference for discovering capabilities and handling responses.

Validate your agent

Run the compliance suite to verify your implementation.