Generated by API Evangelist
Written by API Evangelist tooling for Scope3's API. It is a proposal applied on top of the contract, not a document Scope3 publishes.
# Generated by API Evangelist (build-phrasing.py). Our phrasing, not observed demand.
overlay: 1.0.0
info:
title: API Evangelist conversational phrasing for Scope3 MCP API
version: 1.0.0
extends: openapi/scope3-mcp-api-openapi.yml
actions:
- target: $.info
update:
x-apievangelist-phrasing:
method: generated
generated: '2026-10-01'
generator: build-phrasing.py
label: Generated by API Evangelist
operations: 3
- target: $.paths['/'].post
update:
x-apievangelist-phrasing:
intent: Start an MCP session with the buyer API
effect: write
questions:
- What has to happen before an agent can use the Scope3 buyer MCP tools?
- Which protocol version does the MCP initialize handshake expect?
- Do I need to generate my own session id when opening an MCP session?
instructions:
- text: Open a new MCP session using session id {session_id}.
slots:
session_id: header.mcp-session-id
- text: Initialize the buyer MCP connection with client info {params}.
slots:
params: requestBody.params
method: generated
generated: '2026-10-01'
- target: $.paths['/api-call'].post
update:
x-apievangelist-phrasing:
intent: Call a buyer REST endpoint through MCP
effect: write
questions:
- Can an agent reach any buyer REST endpoint through the MCP api_call tool?
- How do I pass a path, query parameters and a body when calling the REST API over MCP?
instructions:
- text: Through MCP session {session_id}, call the buyer REST endpoint described in {params}.
slots:
session_id: header.mcp-session-id
params: requestBody.params
- text: Use the MCP api_call tool to list my advertisers in session {session_id}.
slots:
session_id: header.mcp-session-id
method: generated
generated: '2026-10-01'
- target: $.paths['/ask-about-capability'].post
update:
x-apievangelist-phrasing:
intent: Ask a plain-language question about API features
effect: read
questions:
- Can I ask the buyer API in plain English what it is able to do?
- Is there a way for an agent to learn the API's features without reading the docs?
instructions:
- text: 'Ask the capability tool in session {session_id}: {params}.'
slots:
session_id: header.mcp-session-id
params: requestBody.params
- text: Find out from the MCP capability helper what I can configure on a campaign, using session {session_id}.
slots:
session_id: header.mcp-session-id
method: generated
generated: '2026-10-01'
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