RTBlint

Validate OpenRTB bid requests and responses against IAB specs.

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What it can do

    What data it sees

    Do you need an account

    No: the server works without sign-in

    Validate OpenRTB bid requests and responses against IAB specs. ARTF, Rust core.

    How to connect

    How to connect RTBlint to Claude

    The server address to paste into Claude settings:

    https://rtblint.org/mcp

    1. Open Claude (claude.ai or the desktop app).
    2. Go to Settings → Connectors.
    3. Click Add custom connector.
    4. Paste the server address copied below into Remote MCP server URL and click Add.
    5. In a chat, click + → Connectors and switch the new connector on.

    Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

    Authorization

    After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

    How to connect RTBlint to ChatGPT

    The server address to paste into ChatGPT settings:

    https://rtblint.org/mcp

    1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
    2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
    3. Open Settings → Connectors and click Create.
    4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
    5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
    6. In a new chat open + → Apps/Connectors and enable the connector.

    OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

    Authorization

    On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

    How to connect RTBlint to Cursor

    The server address to paste into Cursor settings:

    https://rtblint.org/mcp

    Fastest: click Open in Cursor below and confirm the prompt.

    Manually:

    1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
    2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
    3. Save the file. The server appears in the MCP list; authorize it there if asked.

    Authorization

    If the service needs sign-in, an authorize button appears next to the server in the MCP list.

    Server tool list (6)

    Raw names from tools/list. Only developers need these.

    validate_bid_requestValidate an OpenRTB 2.x bid request JSON payload against a tracked spec version. Returns structured issues with rule ids, severities, and JSON paths.
    validate_bid_responseValidate an OpenRTB 2.x bid response JSON payload against a tracked spec version. Optionally cross-validate it against the originating bid request (impid, mtype, adm markup, dealid, seat, and currency coherence). Returns structured issues with rule ids, severities, and JSON paths.
    validate_artf_requestValidate an ARTF (IAB Tech Lab Agentic Real Time Framework) RTBRequest envelope: required members, lifecycle and payload coherence, tmax plausibility, originator and applicable_intents enums, plus full OpenRTB validation of the bid request and bid response it carries. The carried payloads are protobuf JSON, so they are validated in that dialect.
    validate_artf_responseValidate an ARTF RTBResponse mutation set against the RTBRequest it answers: envelope id echo, declared intent against applicable_intents, operation and payload coherence, and whether each semantic path (/imp/{id}, /imp/{id}/pmp/deals/{id}, /user/data/segment, /seatbid/{seat}/bid/{id}) resolves to something the auction actually carries. With apply=true the mutations are written into the payloads and revalidated, reporting the OpenRTB findings the mutations introduced. Call this before proposing mutations to an orchestrator.
    list_openrtb_versionsList every OpenRTB version id this build can validate against, from 2.0 through the monthly 2.6 snapshots. Call this before pinning version on a validate_* tool.
    get_adcp_capabilitiesAdCP protocol discovery. Returns the AdCP releases this agent speaks and the bid-stream conformance metrics it computes. Call this first when wiring rtblint into an agentic buying pipeline: it declares the experimental measurement protocol and the metric ids (openrtb_error_count, openrtb_warning_count, openrtb_conformance_rate) that validate_bid_request and validate_bid_response produce. Part of the Ad Context Protocol (AdCP 3.1) specification.