adcontextprotocol

Build an AdCP sales agent (publisher / SSP / retail-media network). Implement 5 functions, throw 8 typed errors, run it. Framework handles idempotency, HITL, signing, multi-tenant, schema validation.

Use when building an AdCP creative agent — an ad server, creative management platform, or any system that accepts, stores, transforms, and serves ad creatives.

Wire-level invariants for any AdCP buyer call — idempotency_key replay semantics, account `oneOf` variants, async `status:'submitted'`+`task_id` polling, error recovery from `adcp_error.issues[]`. Load before any per-protocol task skill (adcp-media-buy, adcp-creative, adcp-signals, adcp-governance, adcp-si, adcp-brand) when calling an AdCP agent as a buyer.

Use when building an AdCP sponsored intelligence agent — a brand-side conversational AI experience that an LLM host (ChatGPT, Claude, Perplexity, Arc) can hand off to.

Use when building an AdCP seller agent — a publisher, SSP, or retail media network that sells advertising inventory to buyer agents.

Build an AdCP creative-template decisioning platform — a stateless creative transform service (TTS, watermarking, format conversion, template fill). Use when the user wants the typed `DecisioningPlatform` shape; for fork-an-adapter starting points, see `build-creative-agent`.

Build an AdCP signal-marketplace OR signal-owned decisioning platform — a data provider serving audience signals to buyers. Use when the user wants the typed `DecisioningPlatform` shape; for fork-an-adapter starting points, see `build-signals-agent`.

Use when an AdCP compliance storyboard fails on an adapter you believe is spec-correct. Walks the rubric for deciding whether to fix the SDK, the adapter, or file upstream against the spec/storyboard.

Execute AdCP Media Buy Protocol operations with sales agents - discover advertising products, create and manage campaigns, sync creatives, and track delivery. Use when users want to buy advertising, create media buys, interact with ad sales agents, or test advertising APIs.

Execute AdCP Creative Protocol operations with creative agents - build creatives from briefs or existing assets, preview renderings, and discover format specifications. Use when users want to generate or transform ad creatives, preview how ads will look, or understand creative format requirements.

Wire-level invariants for any AdCP buyer call — idempotency_key replay semantics, account `oneOf` variants, async `status:'submitted'`+`task_id` polling, error recovery from `adcp_error.issues[]`. Load before any per-protocol task skill (adcp-media-buy, adcp-creative, adcp-signals, adcp-governance, adcp-si, adcp-brand) when calling an AdCP agent as a buyer.

Execute AdCP Brand Protocol operations with brand agents - get brand identity data, search for licensable rights, acquire rights for campaigns, and manage existing grants. Use when users want to look up brand identities, find talent or IP for licensing, or manage rights grants.

Execute AdCP Governance Protocol operations with governance agents - manage property lists, collection lists, content standards, and campaign governance (plans, checks, outcomes, audit trail). Use when users want to create include/exclude lists, set up brand safety rules, validate content delivery, register campaign plans, validate actions against policy, or produce internal/shareable audit trails.

Execute AdCP Sponsored Intelligence (SI) Protocol operations with brand agents - start conversational sessions, send messages, preview offerings, and manage session lifecycle. Use when users want to have conversations with brand agents, explore product offerings, or manage sponsored interactions.

Execute AdCP Signals Protocol operations with signal agents - discover audience signals using natural language and activate them on DSPs or sales agents. Use when users want to find targeting data, activate audience segments, or work with signal providers.

Use when building an AdCP generative seller in Go — an AI ad network or platform that sells inventory AND generates creatives from briefs.

Use when building an AdCP retail media network agent in Go — sells on-site placements, supports product catalogs, tracks conversions.

Use when building an AdCP seller agent in Go — a publisher, SSP, or retail media network that sells advertising inventory to buyer agents.

Use when building an AdCP creative agent in Go — an ad server, creative management platform, or rendering service.

Use when building an AdCP signals agent in Go — a CDP, data provider, or audience data server that serves targeting segments to buyers.

Use when building an AdCP collection agent in Go — a governance provider, data company, or agency that manages curated lists of content collections (TV shows, podcasts, publications) for targeting and brand safety.

Use when a Go agent needs to send async notifications (task status changes, list changes, artifact batches, revocations) as AdCP-compliant signed webhooks. Covers RFC 9421 webhook-signing, idempotency_key generation, retry, and push_notification_config decoding via the adcp/webhook package.

Use when building an AdCP seller agent — a publisher, SSP, or retail media network that sells advertising inventory to buyer agents.

Use when building an AdCP signals agent, creating an audience data server, or standing up a data provider agent that serves targeting segments to buyers.

Use when building an AdCP creative agent — an ad server, creative management platform, or any system that accepts, stores, transforms, and serves ad creatives.

Use when building an AdCP generative seller — an AI ad network, generative DSP, or platform that sells inventory AND generates creatives from briefs.

Use when building an AdCP retail media network agent — a platform that sells on-site placements, supports product catalogs, tracks conversions, and reports performance.