Zinvyl Marketplace Agent Gateway

Create an authorized purchase intent

create_purchase_intent

Compatibility alias for existing clients; new integrations should use buy_service. Use only after selecting one offer when the calling agent has explicit delegated authority for that exact fixed fee. Creates the governed purchase intent and quote, then returns adaptive Stripe-hosted checkout by default. It does not itself claim payment or start work.

Input Schema

Name	Required	Description
`offer_id`	Yes	Exact published offer ID returned by find_service or list_offers.
`task_summary`	Yes	Sanitized, bounded task summary. Never include credentials, tokens, payment data, personal data, confidential files, or production secrets.
`terms_accepted`	Yes	True only when the authorized buyer has accepted Zinvyl terms version 2026-10-27.1.
`buyer_organization`	Yes	Legal or operating name of the buying organization.
`buyer_contact_email`	Yes	Email for the authorized purchasing contact and order communications.
`bounded_scope_confirmed`	Yes	True only when the buyer controls the inputs and this sanitized request is non-production and contains no secrets.
`delegated_purchase_authority_confirmed`	Yes	True only when the agent is acting within explicit delegated authority for this exact offer and published amount.

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 28, 2026

changedInput schema / properties / terms_accepted / description

Previous value: -"True only when the authorized buyer has accepted Zinvyl terms version 2026-10-23.6."New value: +"True only when the authorized buyer has accepted Zinvyl terms version 2026-10-27.1."

Changed1 schema field changedOct 27, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.api.workflow-reliability-care.v1",
-  "zinvyl.freight.full-workflow-audit.v1",
-  "zinvyl.content.ai-marketing-pilot.v1",
-  "zinvyl.data.csv-cleanup-starter.v1",
-  "zinvyl.data.csv-cleanup-complete.v1",
-  "zinvyl.analytics.operations-bi-dashboard.v1",
-  "zinvyl.quality.ai-workflow-failure-audit.v1",
-  "zinvyl.factory.workflow-single-automation-blueprint.v1",
-  "zinvyl.factory.development-mcp-server-starter.v1",
-  "zinvyl.factory.automation-compliant-market-monitor.v1",
-  "zinvyl.factory.content-instructional-video-pack.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.api.workflow-reliability-care.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1",
+  "zinvyl.data.csv-cleanup-starter.v1",
+  "zinvyl.data.csv-cleanup-complete.v1",
+  "zinvyl.analytics.operations-bi-dashboard.v1",
+  "zinvyl.quality.ai-workflow-failure-audit.v1",
+  "zinvyl.quality.trace-readiness-check.v1",
+  "zinvyl.factory.workflow-single-automation-blueprint.v1",
+  "zinvyl.factory.development-mcp-server-starter.v1",
+  "zinvyl.factory.automation-compliant-market-monitor.v1",
+  "zinvyl.factory.content-instructional-video-pack.v1"
+]

Changed1 schema field changedOct 27, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.api.workflow-reliability-care.v1",
-  "zinvyl.freight.full-workflow-audit.v1",
-  "zinvyl.content.ai-marketing-pilot.v1",
-  "zinvyl.data.csv-cleanup-starter.v1",
-  "zinvyl.data.csv-cleanup-complete.v1",
-  "zinvyl.analytics.operations-bi-dashboard.v1",
-  "zinvyl.quality.ai-workflow-failure-audit.v1",
-  "zinvyl.factory.workflow-single-automation-blueprint.v1",
-  "zinvyl.factory.development-mcp-server-starter.v1",
-  "zinvyl.factory.automation-compliant-market-monitor.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.api.workflow-reliability-care.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1",
+  "zinvyl.data.csv-cleanup-starter.v1",
+  "zinvyl.data.csv-cleanup-complete.v1",
+  "zinvyl.analytics.operations-bi-dashboard.v1",
+  "zinvyl.quality.ai-workflow-failure-audit.v1",
+  "zinvyl.factory.workflow-single-automation-blueprint.v1",
+  "zinvyl.factory.development-mcp-server-starter.v1",
+  "zinvyl.factory.automation-compliant-market-monitor.v1",
+  "zinvyl.factory.content-instructional-video-pack.v1"
+]

Changed1 schema field changedOct 27, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.api.workflow-reliability-care.v1",
-  "zinvyl.freight.full-workflow-audit.v1",
-  "zinvyl.content.ai-marketing-pilot.v1",
-  "zinvyl.data.csv-cleanup-starter.v1",
-  "zinvyl.data.csv-cleanup-complete.v1",
-  "zinvyl.analytics.operations-bi-dashboard.v1",
-  "zinvyl.quality.ai-workflow-failure-audit.v1",
-  "zinvyl.factory.workflow-single-automation-blueprint.v1",
-  "zinvyl.factory.development-mcp-server-starter.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.api.workflow-reliability-care.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1",
+  "zinvyl.data.csv-cleanup-starter.v1",
+  "zinvyl.data.csv-cleanup-complete.v1",
+  "zinvyl.analytics.operations-bi-dashboard.v1",
+  "zinvyl.quality.ai-workflow-failure-audit.v1",
+  "zinvyl.factory.workflow-single-automation-blueprint.v1",
+  "zinvyl.factory.development-mcp-server-starter.v1",
+  "zinvyl.factory.automation-compliant-market-monitor.v1"
+]

Changed1 schema field changedOct 26, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.api.workflow-reliability-care.v1",
-  "zinvyl.freight.full-workflow-audit.v1",
-  "zinvyl.content.ai-marketing-pilot.v1",
-  "zinvyl.data.csv-cleanup-starter.v1",
-  "zinvyl.data.csv-cleanup-complete.v1",
-  "zinvyl.analytics.operations-bi-dashboard.v1",
-  "zinvyl.quality.ai-workflow-failure-audit.v1",
-  "zinvyl.factory.workflow-single-automation-blueprint.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.api.workflow-reliability-care.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1",
+  "zinvyl.data.csv-cleanup-starter.v1",
+  "zinvyl.data.csv-cleanup-complete.v1",
+  "zinvyl.analytics.operations-bi-dashboard.v1",
+  "zinvyl.quality.ai-workflow-failure-audit.v1",
+  "zinvyl.factory.workflow-single-automation-blueprint.v1",
+  "zinvyl.factory.development-mcp-server-starter.v1"
+]

Changed1 schema field changedOct 26, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.api.workflow-reliability-care.v1",
-  "zinvyl.freight.full-workflow-audit.v1",
-  "zinvyl.content.ai-marketing-pilot.v1",
-  "zinvyl.data.csv-cleanup-starter.v1",
-  "zinvyl.data.csv-cleanup-complete.v1",
-  "zinvyl.analytics.operations-bi-dashboard.v1",
-  "zinvyl.quality.ai-workflow-failure-audit.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.api.workflow-reliability-care.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1",
+  "zinvyl.data.csv-cleanup-starter.v1",
+  "zinvyl.data.csv-cleanup-complete.v1",
+  "zinvyl.analytics.operations-bi-dashboard.v1",
+  "zinvyl.quality.ai-workflow-failure-audit.v1",
+  "zinvyl.factory.workflow-single-automation-blueprint.v1"
+]

Changed1 schema field changedOct 26, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.api.workflow-reliability-care.v1",
-  "zinvyl.freight.full-workflow-audit.v1",
-  "zinvyl.content.ai-marketing-pilot.v1",
-  "zinvyl.data.csv-cleanup-starter.v1",
-  "zinvyl.data.csv-cleanup-complete.v1",
-  "zinvyl.analytics.operations-bi-dashboard.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.api.workflow-reliability-care.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1",
+  "zinvyl.data.csv-cleanup-starter.v1",
+  "zinvyl.data.csv-cleanup-complete.v1",
+  "zinvyl.analytics.operations-bi-dashboard.v1",
+  "zinvyl.quality.ai-workflow-failure-audit.v1"
+]

Changed1 schema field changedOct 24, 2026

changedInput schema / properties / terms_accepted / description

Previous value: -"True only when the authorized buyer has accepted Zinvyl terms version 2026-10-23.4."New value: +"True only when the authorized buyer has accepted Zinvyl terms version 2026-10-23.6."

Changed1 schema field changedOct 24, 2026

changedInput schema / properties / terms_accepted / description

Previous value: -"True only when the authorized buyer has accepted Zinvyl terms version 2026-10-23.3."New value: +"True only when the authorized buyer has accepted Zinvyl terms version 2026-10-23.4."

Changed1 schema field changedOct 24, 2026

changedInput schema / properties / terms_accepted / description

Previous value: -"True only when the authorized buyer has accepted Zinvyl terms version 2026-10-23.2."New value: +"True only when the authorized buyer has accepted Zinvyl terms version 2026-10-23.3."

Changed1 schema field changedOct 24, 2026

changedInput schema / properties / terms_accepted / description

Previous value: -"True only when the authorized buyer has accepted Zinvyl terms version 2026-10-13.1."New value: +"True only when the authorized buyer has accepted Zinvyl terms version 2026-10-23.2."

Changed1 schema field changedOct 23, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.api.workflow-reliability-care.v1",
-  "zinvyl.freight.full-workflow-audit.v1",
-  "zinvyl.content.ai-marketing-pilot.v1",
-  "zinvyl.data.csv-cleanup-starter.v1",
-  "zinvyl.data.csv-cleanup-complete.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.api.workflow-reliability-care.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1",
+  "zinvyl.data.csv-cleanup-starter.v1",
+  "zinvyl.data.csv-cleanup-complete.v1",
+  "zinvyl.analytics.operations-bi-dashboard.v1"
+]

Changed1 schema field changedOct 23, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.api.workflow-reliability-care.v1",
-  "zinvyl.freight.full-workflow-audit.v1",
-  "zinvyl.content.ai-marketing-pilot.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.api.workflow-reliability-care.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1",
+  "zinvyl.data.csv-cleanup-starter.v1",
+  "zinvyl.data.csv-cleanup-complete.v1"
+]

Changed2 schema fields changedOct 15, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.freight.full-workflow-audit.v1",
-  "zinvyl.content.ai-marketing-pilot.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.api.workflow-reliability-care.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1"
+]

changedInput schema / properties / terms_accepted / description

Previous value: -"True only when the authorized buyer has accepted Zinvyl terms version 2026-10-05.1."New value: +"True only when the authorized buyer has accepted Zinvyl terms version 2026-10-13.1."

Changed1 schema field changedOct 12, 2026

changedInput schema / properties / offer_id / description

Previous value: -"Exact published offer ID returned by list_offers or qualify_task."New value: +"Exact published offer ID returned by find_service or list_offers."

Changed1 schema field changedOct 8, 2026

changedInput schema / properties / offer_id / enum

Previous value: -[
-  "zinvyl.venture.evidence-brief.v1",
-  "zinvyl.venture.prototype-scope.v1",
-  "zinvyl.freight.workflow-audit.v1",
-  "zinvyl.api.workflow-failure-rescue.v1",
-  "zinvyl.api.failure-triage.v1",
-  "zinvyl.freight.full-workflow-audit.v1"
-]New value: +[
+  "zinvyl.venture.evidence-brief.v1",
+  "zinvyl.venture.prototype-scope.v1",
+  "zinvyl.freight.workflow-audit.v1",
+  "zinvyl.api.workflow-failure-rescue.v1",
+  "zinvyl.api.failure-triage.v1",
+  "zinvyl.freight.full-workflow-audit.v1",
+  "zinvyl.content.ai-marketing-pilot.v1"
+]

Changed1 schema field changedOct 6, 2026

changedInput schema / properties / terms_accepted / description

Previous value: -"True only when the authorized buyer has accepted Zinvyl terms version 2026-09-26.1."New value: +"True only when the authorized buyer has accepted Zinvyl terms version 2026-10-05.1."

Changed8 schema fields changedOct 5, 2026

addedInput schema / properties / bounded_scope_confirmed

Added value: +{
+  "description": "True only when the buyer controls the inputs and this sanitized request is non-production and contains no secrets.",
+  "type": "boolean"
+}

removedInput schema / properties / buyer_contact_name

Removed value: -{
-  "description": "Authorized human principal or purchasing contact.",
-  "maxLength": 200,
-  "minLength": 1,
-  "type": "string"
-}

removedInput schema / properties / buyer_note

Removed value: -{
-  "description": "Optional sanitized purchasing note.",
-  "maxLength": 2000,
-  "type": "string"
-}

removedInput schema / properties / funding_method

Removed value: -{
-  "description": "Requested Stripe-hosted payment method. Availability is determined by Stripe at checkout.",
-  "enum": [
-    "stripe_hosted_card",
-    "stripe_hosted_ach"
-  ],
-  "type": "string"
-}

removedInput schema / properties / no_secrets_in_payload

Removed value: -{
-  "description": "True only after confirming this request contains no credentials, payment data, private keys, or other secrets.",
-  "type": "boolean"
-}

removedInput schema / properties / non_production_only

Removed value: -{
-  "description": "True only when public routing and the initial scope use sanitized, non-production inputs.",
-  "type": "boolean"
-}

removedInput schema / properties / owns_or_controls_inputs

Removed value: -{
-  "description": "True only when the buyer owns or is authorized to provide every described input.",
-  "type": "boolean"
-}

changedInput schema / required

Previous value: -[
-  "offer_id",
-  "buyer_organization",
-  "buyer_contact_name",
-  "buyer_contact_email",
-  "task_summary",
-  "delegated_purchase_authority_confirmed",
-  "owns_or_controls_inputs",
-  "non_production_only",
-  "no_secrets_in_payload",
-  "funding_method",
-  "terms_accepted"
-]New value: +[
+  "offer_id",
+  "buyer_organization",
+  "buyer_contact_email",
+  "task_summary",
+  "delegated_purchase_authority_confirmed",
+  "bounded_scope_confirmed",
+  "terms_accepted"
+]

AddedOct 5, 2026

TDQS

A4.3/5.0

Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare write semantics, non-idempotence, and world-openness; the description adds valuable scoping context by clarifying that it does not claim payment or start work, and that it returns Stripe-hosted checkout. It does not warn that repeated calls are not idempotent and would generate duplicate intents, which is the main remaining behavioral gap.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Four tight sentences, with the compatibility-alias caveat and the alternative tool front-loaded where they matter most. Dense but nothing is padded; the final sentence on non-payment is short and load-bearing.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a seven-parameter, all-required mutation with no output schema, the description covers the lifecycle endpoint (intent + quote), the return surface (hosted checkout), and the boundary of the effect (no payment, no work started). Lacking only guidance on duplicate-call behavior and error cases.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so all seven required fields including the offer_id enum and the authority/scope/terms boolean gates are already documented inline. The description only reinforces that a single exact fixed-fee offer applies; it adds no syntax or gate semantics beyond the schema, so the baseline 3 holds.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource ('Creates the governed purchase intent and quote'), and immediately separates itself from buy_service as a compatibility alias. An agent can distinguish it from buy_service, prepare_purchase_route, and resume_agent_purchase without opening the schema.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicit sequencing ('Use only after selecting one offer'), an explicit precondition ('calling agent has explicit delegated authority for that exact fixed fee'), and an explicit alternative for new work ('new integrations should use buy_service'). No inference required.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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