AB5D

AB5D is a collector‑led archive and argument for the cultural significance of early generative art on Art Blocks. It treats the first five hundred Art Blocks projects (the AB[500]) as a closed cultural period, documenting, analyzing, and preserving them. The archive holds work from 493 of 500 projects, provides essays on each series, and offers a public research API, MCP server, and OpenAPI contract for developers. AB5D aims to assemble, document, and argue for the importance of this early blockchain‑native generative art era.

AB5D publishes 8 API contracts indexed on the APIs.io network, including Artist Tdh API, Artists API, Bounties API, and 5 more. Tagged areas include Company, Art, Blockchain, Generative Art, and Archives.

The AB5D catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

AB5D’s developer surface includes authentication, signup flow, documentation, support, and 19 more developer resources.

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39.0/100 thin ▬ flat Agent 51/100 agent ready Full breakdown ↓
scored 2026-11-02 · rubric v0.26.0 · Show this score on your site →

1 published contract 1 MCP Servers

Company Art Blockchain Generative Art Archives NFT

Kin Score

Kin Score How this is scored →
scored 2026-11-02 · rubric v0.26.0

Composite quality — 39.0/100 · thin

Contract Quality 12.5 / 21

Developer Ergonomics 7.2 / 17

Access Clarity 4.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 2.0 / 10

Discoverability 5.5 / 9

Regulatory Posture 4.6 / 15

Agent readiness — 51/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 8 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too
Agentic Commerce Well-Known Document +5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's

2 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 23.7 — up to +15.3 composite points
Operational Transparency scores 0.0 — up to +13.0 composite points
Developer Ergonomics scores 42.1 — up to +11.6 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/ab5d-xyz/apis.yml: open an issue on github.com/api-evangelist/ab5d-xyz to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 5

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Agent2Agent

measured — observed by APIs.io (conformant)

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

APIs 8

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

AB5D Artist Tdh API

The Artist Tdh API from AB5D — 2 operation(s) for artist tdh.

AB5D Artists API

The Artists API from AB5D — 2 operation(s) for artists.

AB5D Bounties API

The Bounties API from AB5D — 5 operation(s) for bounties.

AB5D Eligibility API

The Eligibility API from AB5D — 1 operation(s) for eligibility.

AB5D Holdings API

The Holdings API from AB5D — 1 operation(s) for holdings.

AB5D Otdh API

The Otdh API from AB5D — 2 operation(s) for otdh.

AB5D Receipts.json API

The Receipts.json API from AB5D — 1 operation(s) for receipts.json.

AB5D Reputation API

The Reputation API from AB5D — 1 operation(s) for reputation.

Scroll for all 8

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

AB5D MCP Server

Remote MCP server at ab5d.xyz.

MCP SERVER

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Ab5D Xyz Context

4 classes · 16 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

AB5D API Rules

10 rules · 9 errors 1 info

SPECTRAL

JSON Schema 3

Standalone JSON Schema definitions for this provider's data models.

ChallengeRequest

2 properties

JSON SCHEMA

ClaimRequest

3 properties

JSON SCHEMA

SubmissionRequest

5 properties

JSON SCHEMA

Security Posture 2

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

Ab5D Xyz Authentication

1 scheme

SECURITY

Ab5D Xyz Domain Security

TLSv1.3

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Ab5D Xyz Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Agentic Access 1

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

Ab5D Xyz Agentic Access

16 operations · 4 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

SignUp

SignUp

DeveloperPortal

DeveloperPortal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

MCPServer

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

License

License

Company 1

The organization behind the API

Website

Website

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: ab5d-xyz
name: AB5D
description: AB5D is a collector‑led archive and argument for the cultural significance of early generative art on Art Blocks.
  It treats the first five hundred Art Blocks projects (the AB[500]) as a closed cultural period, documenting, analyzing,
  and preserving them. The archive holds work from 493 of 500 projects, provides essays on each series, and offers a public
  research API, MCP server, and OpenAPI contract for developers. AB5D aims to assemble, document, and argue for the importance
  of this early blockchain‑native generative art era.
url: https://artifacts.apis.io/ab5d-xyz/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-31 (modular-v1; was harvest)
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-02'
  method: derived
specificationVersion: '0.20'
created: '2026-10-31'
modified: '2026-10-31'
tags:
- Company
- Art
- Blockchain
- Generative Art
- Archives
- NFT
tags_raw:
- Company
- Art
- Blockchain
- Generative-Art
- Archive
- NFT
image: https://ab5d.xyz/brand/ab5d-logo.png
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/ab5d-xyz-agentic-access.yml
- type: Spectral
  url: rules/ab5d-xyz-rules.yml
- type: JSONLD
  url: json-ld/ab5d-xyz-context.jsonld
- type: Vocabulary
  url: vocabulary/ab5d-xyz-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/ab5d-xyz-data-model.yml
- type: Authentication
  url: authentication/ab5d-xyz-authentication.yml
- type: ErrorCatalog
  url: errors/ab5d-xyz-problem-types.yml
- type: Conformance
  url: conformance/ab5d-xyz-conformance.yml
- type: LLMsTxt
  url: llms/ab5d-xyz-llms.txt
- type: AgentCard
  url: a2a/ab5d-xyz-a2a.yml
- type: MCPServer
  url: mcp/ab5d-xyz-mcp.yml
- type: WellKnown
  url: well-known/ab5d-xyz-well-known.yml
- type: Hosts
  url: hosts/ab5d-xyz-hosts.yml
- type: Vendors
  url: vendors/ab5d-xyz-vendors.yml
- type: SignUp
  url: https://ab5d.xyz/register/
- type: PrivacyPolicy
  url: https://ab5d.xyz/privacy/
- type: DomainSecurity
  url: security/ab5d-xyz-domain-security.yml
- type: Website
  url: https://ab5d.xyz/
- type: DeveloperPortal
  url: https://ab5d.xyz/developers/
- type: Documentation
  url: https://ab5d.xyz/developers/
- type: Support
  url: https://ab5d.xyz/contact/
- type: License
  url: https://ab5d.xyz/license/
apis:
- aid: ab5d-xyz:ab5d-xyz-artist-tdh-api
  name: AB5D Artist Tdh API
  description: The Artist Tdh API from AB5D — 2 operation(s) for artist tdh.
  humanURL: https://ab5d.xyz/developers/
  baseURL: https://ab5d.xyz
  tags:
  - Artist Tdh
  properties:
  - type: OpenAPI
    url: openapi/ab5d-xyz-artist-tdh-api-openapi.yml
  - type: JSONSchema
    url: json-schema/ab5d-xyz-submission-request-schema.json
  - type: JSONSchema
    url: json-schema/ab5d-xyz-claim-request-schema.json
  - type: JSONSchema
    url: json-schema/ab5d-xyz-challenge-request-schema.json
- aid: ab5d-xyz:ab5d-xyz-artists-api
  name: AB5D Artists API
  description: The Artists API from AB5D — 2 operation(s) for artists.
  humanURL: https://ab5d.xyz/developers/
  baseURL: https://ab5d.xyz
  tags:
  - Artists
  properties:
  - type: OpenAPI
    url: openapi/ab5d-xyz-artists-api-openapi.yml
  - type: JSONSchema
    url: json-schema/ab5d-xyz-submission-request-schema.json
  - type: JSONSchema
    url: json-schema/ab5d-xyz-claim-request-schema.json
  - type: JSONSchema
    url: json-schema/ab5d-xyz-challenge-request-schema.json
- aid: ab5d-xyz:ab5d-xyz-bounties-api
  name: AB5D Bounties API
  description: The Bounties API from AB5D — 5 operation(s) for bounties.
  humanURL: https://ab5d.xyz/developers/
  baseURL: https://ab5d.xyz
  tags:
  - Bounties
  properties:
  - type: OpenAPI
    url: openapi/ab5d-xyz-bounties-api-openapi.yml
  - type: JSONSchema
    url: json-schema/ab5d-xyz-submission-request-schema.json
  - type: JSONSchema
    url: json-schema/ab5d-xyz-claim-request-schema.json
  - type: JSONSchema
    url: json-schema/ab5d-xyz-challenge-request-schema.json
- aid: ab5d-xyz:ab5d-xyz-eligibility-api
  name: AB5D Eligibility API
  description: The Eligibility API from AB5D — 1 operation(s) for eligibility.
  humanURL: https://ab5d.xyz/developers/
  baseURL: https://ab5d.xyz
  tags:
  - Eligibility
  properties:
  - type: OpenAPI
    url: openapi/ab5d-xyz-eligibility-api-openapi.yml
  - type: JSONSchema
    url: json-schema/ab5d-xyz-submission-request-schema.json
  - type: JSONSchema
    url: json-schema/ab5d-xyz-claim-request-schema.json
  - type: JSONSchema
    url: json-schema/ab5d-xyz-challenge-request-schema.json
- aid: ab5d-xyz:ab5d-xyz-holdings-api
  name: AB5D Holdings API
  description: The Holdings API from AB5D — 1 operation(s) for holdings.
  humanURL: https://ab5d.xyz/developers/
  baseURL: https://ab5d.xyz
  tags:
  - Holdings
  properties:
  - type: OpenAPI
    url: openapi/ab5d-xyz-holdings-api-openapi.yml
  - type: JSONSchema
    url: json-schema/ab5d-xyz-submission-request-schema.json
  - type: JSONSchema
    url: json-schema/ab5d-xyz-claim-request-schema.json
  - type: JSONSchema
    url: json-schema/ab5d-xyz-challenge-request-schema.json
- aid: ab5d-xyz:ab5d-xyz-otdh-api
  name: AB5D Otdh API
  description: The Otdh API from AB5D — 2 operation(s) for otdh.
  humanURL: https://ab5d.xyz/developers/
  baseURL: https://ab5d.xyz
  tags:
  - Otdh
  properties:
  - type: OpenAPI
    url: openapi/ab5d-xyz-otdh-api-openapi.yml
  - type: JSONSchema
    url: json-schema/ab5d-xyz-submission-request-schema.json
  - type: JSONSchema
    url: json-schema/ab5d-xyz-claim-request-schema.json
  - type: JSONSchema
    url: json-schema/ab5d-xyz-challenge-request-schema.json
- aid: ab5d-xyz:ab5d-xyz-receipts-json-api
  name: AB5D Receipts.json API
  description: The Receipts.json API from AB5D — 1 operation(s) for receipts.json.
  humanURL: https://ab5d.xyz/developers/
  baseURL: https://ab5d.xyz
  tags:
  - Receipts.json
  properties:
  - type: OpenAPI
    url: openapi/ab5d-xyz-receipts-json-api-openapi.yml
  - type: JSONSchema
    url: json-schema/ab5d-xyz-submission-request-schema.json
  - type: JSONSchema
    url: json-schema/ab5d-xyz-claim-request-schema.json
  - type: JSONSchema
    url: json-schema/ab5d-xyz-challenge-request-schema.json
- aid: ab5d-xyz:ab5d-xyz-reputation-api
  name: AB5D Reputation API
  description: The Reputation API from AB5D — 1 operation(s) for reputation.
  humanURL: https://ab5d.xyz/developers/
  baseURL: https://ab5d.xyz
  tags:
  - Reputation
  properties:
  - type: OpenAPI
    url: openapi/ab5d-xyz-reputation-api-openapi.yml
  - type: JSONSchema
    url: json-schema/ab5d-xyz-submission-request-schema.json
  - type: JSONSchema
    url: json-schema/ab5d-xyz-claim-request-schema.json
  - type: JSONSchema
    url: json-schema/ab5d-xyz-challenge-request-schema.json
x-enrichment:
  date: '2026-10-31'
  status: enriched
  artifacts_added: 32
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

AB5D API — frequently asked questions

Does AB5D have an API?

Yes. APIs.io lists 8 APIs from AB5D, including AB5D Artist Tdh API, AB5D Artists API and AB5D Bounties API, and 5 more.

Is there an OpenAPI specification for the AB5D API?

Yes. APIs.io indexes 8 OpenAPI specifications for AB5D, each linked for download from this page.

How do I authenticate with the AB5D API?

AB5D documents its authentication (1 scheme). The details are profiled on APIs.io as Ab5D Xyz Authentication.

Does AB5D have an MCP server?

Yes. APIs.io lists 1 MCP server for AB5D: Remote MCP server at ab5d.xyz.

Is the AB5D API ready for AI agents?

AB5D has a Kin Score of 39.0 out of 100 (thin) and an Agent Readiness score of 50.6 (agent-ready), scored by API Evangelist on 2026-11-02.

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