Polycode

Polycode Limited is a UK information-technology consultancy (Companies House 10172940, Leeds, incorporated 2016) that operates marginalia, a small public chat experiment built on a shared, provenance-tracked memory graph: a language model synthesises conversations into an OWL-typed graph and questions are answered by narrowing that graph with SPARQL. marginalia publishes a public REST API (OpenAPI 3.0.3, 50 operations at https://marginalia.polycode.co.uk/api — async chat with task polling, session search and history, insights, projects, usage and budget, key-authed private graphs; no key for reads and chat), an A2A 0.3.0 agent card at /.well-known/agent-card.json with a live JSON-RPC endpoint (message/send, message/stream, tasks/get) advertising chat, recall-memory and research-projects skills, an OpenAI-shaped zero-token completion shim, a first-party CLI and the AGPL-3.0 source on GitLab. Visitor contributions are PII-redacted at ingest and republished under CC-BY-SA 4.0; a volatile flag keeps a turn out of shared memory. The corporate apex polycode.co.uk did not resolve when profiled; the product host is the live web presence.

Polycode publishes 19 API contracts indexed on the APIs.io network, including Admin API, Budget API, Chat API, and 16 more. Tagged areas include Chat, Memory, Agents, A2A, and Knowledge Graph.

Polycode’s developer surface includes engineering blog, documentation, API reference, getting-started guide, support, authentication, sandbox, and 34 more developer resources.

🌐 Visit website 📡 Source on GitHub

47.8/100 developing ▬ flat Agent 27/100 agent aware Front door AI 2/6 trace Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0

2 published contracts

Chat Memory Agents A2A Knowledge Graph Research Artificial Intelligence Open Source Consulting United Kingdom

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Developer Platform & API Ecosystem Management

BC-4270

Keys

Kin Score

Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0

Composite quality — 47.8/100 · developing

Contract Quality 7.2 / 19

Developer Ergonomics 11.0 / 15

Access Clarity 5.1 / 15

Operational Transparency 4.6 / 10

Contract Governance 0.4 / 9

Discoverability 5.0 / 8

Regulatory Posture 6.4 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 27/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 8 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/polycode-co-uk: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 19

Individual APIs this provider publishes, each with its own machine-readable definition.

marginalia A2A Agent

Agent2Agent (A2A) surface for marginalia: an agent card served from https://marginalia.polycode.co.uk/.well-known/agent-card.json (protocolVersion 0.3.0, JSONRPC, version 0.2.0)...

Polycode Admin API

The Admin API from Polycode — 3 operation(s) for admin.

Polycode Budget API

The Budget API from Polycode — 1 operation(s) for budget.

Polycode Chat API

The Chat API from Polycode — 3 operation(s) for chat.

Polycode Diverts API

The Diverts API from Polycode — 1 operation(s) for diverts.

Polycode Flag API

The Flag API from Polycode — 1 operation(s) for flag.

Polycode Graph API

The Graph API from Polycode — 11 operation(s) for graph.

Polycode Graphs API

The Graphs API from Polycode — 8 operation(s) for graphs.

Polycode Hooks API

The Hooks API from Polycode — 3 operation(s) for hooks.

Polycode Keys API

The Keys API from Polycode — 2 operation(s) for keys.

Polycode Me API

The Me API from Polycode — 1 operation(s) for me.

Polycode Openapi.json API

The Openapi.json API from Polycode — 1 operation(s) for openapi.json.

Polycode Project API

The Project API from Polycode — 1 operation(s) for project.

Polycode Projects API

The Projects API from Polycode — 3 operation(s) for projects.

Polycode Sessions API

The Sessions API from Polycode — 2 operation(s) for sessions.

Polycode Status API

The Status API from Polycode — 1 operation(s) for status.

Polycode Test API

The Test API from Polycode — 1 operation(s) for test.

Polycode Usage API

The Usage API from Polycode — 2 operation(s) for usage.

Polycode Visitor API

The Visitor API from Polycode — 2 operation(s) for visitor.

Scroll for all 19

Pricing Plans 1

Published pricing tiers and plan structures.

Polycode Co Uk Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Polycode Co Uk Rate Limits

3 limits

RATE LIMITS

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Polycode Co Uk Marginalia Overlay

14 actions · documentation · polycode-co-uk-marginalia-openapi.json

GENERATED

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Polycode Co Uk Authentication

none/apiKey/openIdConnect/hmac · 4 schemes

SECURITY

Polycode Co Uk Domain Security

TLSv1.3 · DMARC

SECURITY

Polycode Co Uk Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Polycode Co Uk Agentic Access

50 operations · 24 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Login

Sandbox

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

WellKnown

LLMsTxt

AgentSkill

AgenticAccess

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Build 4

SDKs, sample code, and the tooling you integrate with

GitLabRepositories

GitLabRepositories

GitLabOrganizations

GitLabOrganizations

Packages

Packages

CLI

CLI

Access & Security 4

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Operate 3

Status, limits, changes, and where to get help

Support

Support

RoadMap

RoadMap

RateLimits

RateLimits

Commercial 5

Pricing, plans, and the legal terms of use

TermsOfService

PrivacyPolicy

PrivacyPolicy

License

Plans

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 8

Properties that don't map to a standard resource type

CapabilityMap

Overlay

OpenSource

AgentCard

DataSubjectRequest

AITransparency

NoticeAndAction

DataResidency

Scroll for all 8

Source (apis.yml)

aid: polycode-co-uk
name: Polycode
description: 'Polycode Limited is a UK information-technology consultancy (Companies House 10172940, Leeds, incorporated 2016)
  that operates marginalia, a small public chat experiment built on a shared, provenance-tracked memory graph: a language
  model synthesises conversations into an OWL-typed graph and questions are answered by narrowing that graph with SPARQL.
  marginalia publishes a public REST API (OpenAPI 3.0.3, 50 operations at https://marginalia.polycode.co.uk/api — async chat
  with task polling, session search and history, insights, projects, usage and budget, key-authed private graphs; no key for
  reads and chat), an A2A 0.3.0 agent card at /.well-known/agent-card.json with a live JSON-RPC endpoint (message/send, message/stream,
  tasks/get) advertising chat, recall-memory and research-projects skills, an OpenAI-shaped zero-token completion shim, a
  first-party CLI and the AGPL-3.0 source on GitLab. Visitor contributions are PII-redacted at ingest and republished under
  CC-BY-SA 4.0; a volatile flag keeps a turn out of shared memory. The corporate apex polycode.co.uk did not resolve when
  profiled; the product host is the live web presence.'
url: https://raw.githubusercontent.com/api-evangelist/polycode-co-uk/refs/heads/main/apis.yml
image: https://marginalia.polycode.co.uk/favicon.svg
x-type: company
x-source: harvest:a2a-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-09-19 (local-v3; was a2a-registry harvest stub)
specificationVersion: '0.20'
created: '2026-09-19'
modified: '2026-10-06'
tags:
- Chat
- Memory
- Agents
- A2A
- Knowledge Graph
- Research
- Artificial Intelligence
- Open Source
- Consulting
- United Kingdom
tags_raw:
- Chat
- Memory
- Agents
- A2A
- Knowledge Graph
- Research
- Artificial Intelligence
- Open Source
- Consulting
- United Kingdom
- Open-Source
apis:
- aid: polycode-co-uk:marginalia-a2a-agent
  name: marginalia A2A Agent
  description: 'Agent2Agent (A2A) surface for marginalia: an agent card served from https://marginalia.polycode.co.uk/.well-known/agent-card.json
    (protocolVersion 0.3.0, JSONRPC, version 0.2.0) advertising three skills (open chat, recall memory, research projects)
    and a live JSON-RPC endpoint at https://marginalia.polycode.co.uk/api/a2a.'
  humanURL: https://marginalia.polycode.co.uk/
  baseURL: https://marginalia.polycode.co.uk/api/a2a
  tags:
  - A2A
  - Agents
  - Chat
  - Memory
  properties:
  - type: AgentCard
    url: a2a/polycode-co-uk-a2a.yml
  - type: AgentCard
    name: A2A Agent Card (provider-hosted)
    url: https://marginalia.polycode.co.uk/.well-known/agent-card.json
  - type: Documentation
    name: 'README — Talk to it: the A2A API'
    url: https://gitlab.com/polycode-projects/marginalia/-/blob/main/README.md#talk-to-it--the-a2a-api
- aid: polycode-co-uk:polycode-co-uk-admin-api
  name: Polycode Admin API
  description: The Admin API from Polycode — 3 operation(s) for admin.
  humanURL: https://marginalia.polycode.co.uk/developers
  baseURL: https://marginalia.polycode.co.uk/api
  tags:
  - Admin
  properties:
  - type: OpenAPI
    url: openapi/polycode-co-uk-admin-api-openapi.yml
  - type: Documentation
    url: https://marginalia.polycode.co.uk/developers
  - type: APIReference
    url: https://marginalia.polycode.co.uk/api/openapi.json
  - type: Sandbox
    url: sandbox/polycode-co-uk-sandbox.yml
- aid: polycode-co-uk:polycode-co-uk-budget-api
  name: Polycode Budget API
  description: The Budget API from Polycode — 1 operation(s) for budget.
  humanURL: https://marginalia.polycode.co.uk/developers
  baseURL: https://marginalia.polycode.co.uk/api
  tags:
  - Budgets
  tags_raw:
  - Budget
  properties:
  - type: OpenAPI
    url: openapi/polycode-co-uk-budget-api-openapi.yml
  - type: Documentation
    url: https://marginalia.polycode.co.uk/developers
  - type: APIReference
    url: https://marginalia.polycode.co.uk/api/openapi.json
  - type: Sandbox
    url: sandbox/polycode-co-uk-sandbox.yml
- aid: polycode-co-uk:polycode-co-uk-chat-api
  name: Polycode Chat API
  description: The Chat API from Polycode — 3 operation(s) for chat.
  humanURL: https://marginalia.polycode.co.uk/developers
  baseURL: https://marginalia.polycode.co.uk/api
  tags:
  - Chat
  properties:
  - type: OpenAPI
    url: openapi/polycode-co-uk-chat-api-openapi.yml
  - type: Documentation
    url: https://marginalia.polycode.co.uk/developers
  - type: APIReference
    url: https://marginalia.polycode.co.uk/api/openapi.json
  - type: Sandbox
    url: sandbox/polycode-co-uk-sandbox.yml
- aid: polycode-co-uk:polycode-co-uk-diverts-api
  name: Polycode Diverts API
  description: The Diverts API from Polycode — 1 operation(s) for diverts.
  humanURL: https://marginalia.polycode.co.uk/developers
  baseURL: https://marginalia.polycode.co.uk/api
  tags:
  - Diverts
  properties:
  - type: OpenAPI
    url: openapi/polycode-co-uk-diverts-api-openapi.yml
  - type: Documentation
    url: https://marginalia.polycode.co.uk/developers
  - type: APIReference
    url: https://marginalia.polycode.co.uk/api/openapi.json
  - type: Sandbox
    url: sandbox/polycode-co-uk-sandbox.yml
- aid: polycode-co-uk:polycode-co-uk-flag-api
  name: Polycode Flag API
  description: The Flag API from Polycode — 1 operation(s) for flag.
  humanURL: https://marginalia.polycode.co.uk/developers
  baseURL: https://marginalia.polycode.co.uk/api
  tags:
  - Flag
  properties:
  - type: OpenAPI
    url: openapi/polycode-co-uk-flag-api-openapi.yml
  - type: Documentation
    url: https://marginalia.polycode.co.uk/developers
  - type: APIReference
    url: https://marginalia.polycode.co.uk/api/openapi.json
  - type: Sandbox
    url: sandbox/polycode-co-uk-sandbox.yml
- aid: polycode-co-uk:polycode-co-uk-graph-api
  name: Polycode Graph API
  description: The Graph API from Polycode — 11 operation(s) for graph.
  humanURL: https://marginalia.polycode.co.uk/developers
  baseURL: https://marginalia.polycode.co.uk/api
  tags:
  - Graph
  properties:
  - type: OpenAPI
    url: openapi/polycode-co-uk-graph-api-openapi.yml
  - type: Documentation
    url: https://marginalia.polycode.co.uk/developers
  - type: APIReference
    url: https://marginalia.polycode.co.uk/api/openapi.json
  - type: Sandbox
    url: sandbox/polycode-co-uk-sandbox.yml
- aid: polycode-co-uk:polycode-co-uk-graphs-api
  name: Polycode Graphs API
  description: The Graphs API from Polycode — 8 operation(s) for graphs.
  humanURL: https://marginalia.polycode.co.uk/developers
  baseURL: https://marginalia.polycode.co.uk/api
  tags:
  - Graphs
  properties:
  - type: OpenAPI
    url: openapi/polycode-co-uk-graphs-api-openapi.yml
  - type: Documentation
    url: https://marginalia.polycode.co.uk/developers
  - type: APIReference
    url: https://marginalia.polycode.co.uk/api/openapi.json
  - type: Sandbox
    url: sandbox/polycode-co-uk-sandbox.yml
- aid: polycode-co-uk:polycode-co-uk-hooks-api
  name: Polycode Hooks API
  description: The Hooks API from Polycode — 3 operation(s) for hooks.
  humanURL: https://marginalia.polycode.co.uk/developers
  baseURL: https://marginalia.polycode.co.uk/api
  tags:
  - Hooks
  properties:
  - type: OpenAPI
    url: openapi/polycode-co-uk-hooks-api-openapi.yml
  - type: Documentation
    url: https://marginalia.polycode.co.uk/developers
  - type: APIReference
    url: https://marginalia.polycode.co.uk/api/openapi.json
  - type: Sandbox
    url: sandbox/polycode-co-uk-sandbox.yml
- aid: polycode-co-uk:polycode-co-uk-keys-api
  name: Polycode Keys API
  description: The Keys API from Polycode — 2 operation(s) for keys.
  humanURL: https://marginalia.polycode.co.uk/developers
  baseURL: https://marginalia.polycode.co.uk/api
  tags:
  - Keys
  properties:
  - type: OpenAPI
    url: openapi/polycode-co-uk-keys-api-openapi.yml
  - type: Documentation
    url: https://marginalia.polycode.co.uk/developers
  - type: APIReference
    url: https://marginalia.polycode.co.uk/api/openapi.json
  - type: Sandbox
    url: sandbox/polycode-co-uk-sandbox.yml
- aid: polycode-co-uk:polycode-co-uk-me-api
  name: Polycode Me API
  description: The Me API from Polycode — 1 operation(s) for me.
  humanURL: https://marginalia.polycode.co.uk/developers
  baseURL: https://marginalia.polycode.co.uk/api
  tags:
  - Me
  properties:
  - type: OpenAPI
    url: openapi/polycode-co-uk-me-api-openapi.yml
  - type: Documentation
    url: https://marginalia.polycode.co.uk/developers
  - type: APIReference
    url: https://marginalia.polycode.co.uk/api/openapi.json
  - type: Sandbox
    url: sandbox/polycode-co-uk-sandbox.yml
- aid: polycode-co-uk:polycode-co-uk-openapi-json-api
  name: Polycode Openapi.json API
  description: The Openapi.json API from Polycode — 1 operation(s) for openapi.json.
  humanURL: https://marginalia.polycode.co.uk/developers
  baseURL: https://marginalia.polycode.co.uk/api
  tags:
  - Openapi.json
  properties:
  - type: OpenAPI
    url: openapi/polycode-co-uk-openapi-json-api-openapi.yml
  - type: Documentation
    url: https://marginalia.polycode.co.uk/developers
  - type: APIReference
    url: https://marginalia.polycode.co.uk/api/openapi.json
  - type: Sandbox
    url: sandbox/polycode-co-uk-sandbox.yml
- aid: polycode-co-uk:polycode-co-uk-project-api
  name: Polycode Project API
  description: The Project API from Polycode — 1 operation(s) for project.
  humanURL: https://marginalia.polycode.co.uk/developers
  baseURL: https://marginalia.polycode.co.uk/api
  tags:
  - Project
  properties:
  - type: OpenAPI
    url: openapi/polycode-co-uk-project-api-openapi.yml
  - type: Documentation
    url: https://marginalia.polycode.co.uk/developers
  - type: APIReference
    url: https://marginalia.polycode.co.uk/api/openapi.json
  - type: Sandbox
    url: sandbox/polycode-co-uk-sandbox.yml
- aid: polycode-co-uk:polycode-co-uk-projects-api
  name: Polycode Projects API
  description: The Projects API from Polycode — 3 operation(s) for projects.
  humanURL: https://marginalia.polycode.co.uk/developers
  baseURL: https://marginalia.polycode.co.uk/api
  tags:
  - Project
  tags_raw:
  - Projects
  properties:
  - type: OpenAPI
    url: openapi/polycode-co-uk-projects-api-openapi.yml
  - type: Documentation
    url: https://marginalia.polycode.co.uk/developers
  - type: APIReference
    url: https://marginalia.polycode.co.uk/api/openapi.json
  - type: Sandbox
    url: sandbox/polycode-co-uk-sandbox.yml
- aid: polycode-co-uk:polycode-co-uk-sessions-api
  name: Polycode Sessions API
  description: The Sessions API from Polycode — 2 operation(s) for sessions.
  humanURL: https://marginalia.polycode.co.uk/developers
  baseURL: https://marginalia.polycode.co.uk/api
  tags:
  - Sessions
  properties:
  - type: OpenAPI
    url: openapi/polycode-co-uk-sessions-api-openapi.yml
  - type: Documentation
    url: https://marginalia.polycode.co.uk/developers
  - type: APIReference
    url: https://marginalia.polycode.co.uk/api/openapi.json
  - type: Sandbox
    url: sandbox/polycode-co-uk-sandbox.yml
- aid: polycode-co-uk:polycode-co-uk-status-api
  name: Polycode Status API
  description: The Status API from Polycode — 1 operation(s) for status.
  humanURL: https://marginalia.polycode.co.uk/developers
  baseURL: https://marginalia.polycode.co.uk/api
  tags:
  - Status
  properties:
  - type: OpenAPI
    url: openapi/polycode-co-uk-status-api-openapi.yml
  - type: Documentation
    url: https://marginalia.polycode.co.uk/developers
  - type: APIReference
    url: https://marginalia.polycode.co.uk/api/openapi.json
  - type: Sandbox
    url: sandbox/polycode-co-uk-sandbox.yml
- aid: polycode-co-uk:polycode-co-uk-test-api
  name: Polycode Test API
  description: The Test API from Polycode — 1 operation(s) for test.
  humanURL: https://marginalia.polycode.co.uk/developers
  baseURL: https://marginalia.polycode.co.uk/api
  tags: []
  tags_raw:
  - Test
  properties:
  - type: OpenAPI
    url: openapi/polycode-co-uk-test-api-openapi.yml
  - type: Documentation
    url: https://marginalia.polycode.co.uk/developers
  - type: APIReference
    url: https://marginalia.polycode.co.uk/api/openapi.json
  - type: Sandbox
    url: sandbox/polycode-co-uk-sandbox.yml
- aid: polycode-co-uk:polycode-co-uk-usage-api
  name: Polycode Usage API
  description: The Usage API from Polycode — 2 operation(s) for usage.
  humanURL: https://marginalia.polycode.co.uk/developers
  baseURL: https://marginalia.polycode.co.uk/api
  tags:
  - Usage
  properties:
  - type: OpenAPI
    url: openapi/polycode-co-uk-usage-api-openapi.yml
  - type: Documentation
    url: https://marginalia.polycode.co.uk/developers
  - type: APIReference
    url: https://marginalia.polycode.co.uk/api/openapi.json
  - type: Sandbox
    url: sandbox/polycode-co-uk-sandbox.yml
- aid: polycode-co-uk:polycode-co-uk-visitor-api
  name: Polycode Visitor API
  description: The Visitor API from Polycode — 2 operation(s) for visitor.
  humanURL: https://marginalia.polycode.co.uk/developers
  baseURL: https://marginalia.polycode.co.uk/api
  tags:
  - Visitor
  properties:
  - type: OpenAPI
    url: openapi/polycode-co-uk-visitor-api-openapi.yml
  - type: Documentation
    url: https://marginalia.polycode.co.uk/developers
  - type: APIReference
    url: https://marginalia.polycode.co.uk/api/openapi.json
  - type: Sandbox
    url: sandbox/polycode-co-uk-sandbox.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- url: https://marginalia.polycode.co.uk/blog/
  type: Blog
- type: CapabilityMap
  url: capabilities/polycode-co-uk-capability-edges.yml
  name: Polycode Business Capability Map
- type: Overlay
  url: overlays/polycode-co-uk-marginalia-overlay.yaml
- type: Website
  url: https://marginalia.polycode.co.uk/
- type: DeveloperPortal
  url: https://marginalia.polycode.co.uk/developers
  name: 'developers page (client-rendered: model, deployed commit, Swagger UI at /developers/api)'
- type: Documentation
  url: https://gitlab.com/polycode-projects/marginalia/-/blob/main/README.md
- type: APIReference
  url: https://marginalia.polycode.co.uk/api/openapi.json
- type: GettingStarted
  url: https://gitlab.com/polycode-projects/marginalia/-/blob/main/README.md#talk-to-it--the-a2a-api
  name: 'README — Talk to it: the A2A API (curl examples)'
- type: Login
  url: https://marginalia.polycode.co.uk/auth/login
  name: Tier-1 login (Google via Amazon Cognito)
- type: Support
  url: mailto:antony@polycode.co.uk
  name: Operator contact (email) — issues, security disclosures, GDPR requests
- type: TermsOfService
  url: https://marginalia.polycode.co.uk/#legal-text-terms
  name: Terms (inline dialog on the chat surface, static HTML)
- type: PrivacyPolicy
  url: https://marginalia.polycode.co.uk/#legal-text-privacy
  name: Privacy (inline dialog on the chat surface, static HTML)
- type: PrivacyPolicy
  url: https://gitlab.com/polycode-projects/marginalia/-/blob/main/_developers/ETHICS.md
  name: ETHICS.md — redact-at-ingest privacy policy and visitor rights
- type: License
  url: https://gitlab.com/polycode-projects/marginalia/-/blob/main/LICENSE
  name: AGPL-3.0-only (code); CC-BY-SA 4.0 (visitor contributions)
- type: OpenSource
  url: https://gitlab.com/polycode-projects/marginalia
- type: GitLabRepositories
  url: https://gitlab.com/polycode-projects/marginalia
- type: GitLabOrganizations
  url: https://gitlab.com/polycode-projects
- type: RoadMap
  url: https://gitlab.com/polycode-projects/marginalia/-/blob/main/NEXT.md
  name: NEXT.md — living handover and open items
- type: AgentCard
  url: a2a/polycode-co-uk-a2a.yml
- type: WellKnown
  url: well-known/polycode-co-uk-well-known.yml
- type: LLMsTxt
  url: llms/polycode-co-uk-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: Authentication
  url: authentication/polycode-co-uk-authentication.yml
- type: Conventions
  url: conventions/polycode-co-uk-conventions.yml
- type: ErrorCatalog
  url: errors/polycode-co-uk-problem-types.yml
- type: Lifecycle
  url: lifecycle/polycode-co-uk-lifecycle.yml
- type: Conformance
  url: conformance/polycode-co-uk-conformance.yml
- type: DataModel
  url: data-model/polycode-co-uk-data-model.yml
- type: Sandbox
  url: sandbox/polycode-co-uk-sandbox.yml
- type: Plans
  url: plans/polycode-co-uk-plans-pricing.yml
- type: RateLimits
  url: rate-limits/polycode-co-uk-rate-limits.yml
- type: Packages
  url: packages/polycode-co-uk-packages.yml
- type: CLI
  url: cli/polycode-co-uk-cli.yml
- type: AgenticAccess
  url: agentic-access/polycode-co-uk-agentic-access.yml
- type: DomainSecurity
  url: security/polycode-co-uk-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/polycode-co-uk-vulnerability-disclosure.yml
- type: Security
  url: https://gitlab.com/polycode-projects/marginalia/-/blob/main/_developers/ETHICS.md
  name: Security disclosures — email channel stated in ETHICS.md ("Issues, security disclosures, GDPR requests")
- type: DataSubjectRequest
  url: https://gitlab.com/polycode-projects/marginalia/-/blob/main/_developers/ETHICS.md
  name: UK GDPR access / rectification / erasure by email with the session UUID
- type: AITransparency
  url: https://marginalia.polycode.co.uk/
  name: AI-system disclaimer shown before the first message (model, region, operator)
- type: NoticeAndAction
  url: https://marginalia.polycode.co.uk/
  name: Flag this memory (dialog + POST /api/flag) — operator review flow
- type: DataResidency
  url: https://gitlab.com/polycode-projects/marginalia/-/blob/main/README.md#operating
  name: Hosting/inference region statement (Amazon Bedrock, eu-west-2)
x-enrichment:
  date: '2026-09-19'
  status: enriched
  artifacts_added: 26
  pass: local-v3
x-legal-name: Polycode Limited
x-a2a:
  verified: true
  probed: '2026-09-26'
  url: https://marginalia.polycode.co.uk/.well-known/agent-card.json
  grade: conformant
  protocol_version: 0.3.0
  control: 403

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