ZeroEntropy

ZeroEntropy builds specialized, lightweight AI models for information retrieval and retrieval-augmented generation (RAG). Its zerank rerankers and zembed embedding models improve the accuracy of any search pipeline, and its hosted retrieval API lets developers create collections, index documents, and run relevance queries (top documents, pages, and snippets) with metadata filtering. The API is a versioned (/v1) HTTP JSON service with US and EU data-center endpoints, official Python and TypeScript SDKs, and API-key bearer authentication. ZeroEntropy is a portfolio company of Initialized Capital operating in the enterprise AI / search sector.

ZeroEntropy publishes 7 API contracts indexed on the APIs.io network, including Admin API, Collections API, Documents API, and 4 more. Tagged areas include Company, Enterprise Saas, Artificial Intelligence, Search, and Retrieval.

The ZeroEntropy catalog on APIs.io includes 1 Spectral governance ruleset.

ZeroEntropy’s developer surface includes authentication, documentation, API reference, quickstart, signup flow, pricing, engineering blog, and 16 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

52.9/100 developing ▬ flat Agent 30/100 agent ready Front door AI 6/6 dominant Heartbeat 36/100 going silent saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 published contract 2 Agent Skills

Company Enterprise Saas Artificial Intelligence Search Retrieval Embeddings Reranking RAG

What this lets a business do 3

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

AI Model Services

AE-110

Documents

POST /documents/add-document

Developer Platform & API Ecosystem Management

BC-4270

Admin

POST /admin/add-api-key POST /admin/list-api-keys

Information & Data Management

BC-610

Models

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 52.9/100 · developing

Contract Quality 11.0 / 19

Developer Ergonomics 8.1 / 15

Access Clarity 11.4 / 15

Operational Transparency 0.3 / 10

Contract Governance 1.6 / 9

Discoverability 5.5 / 8

Regulatory Posture 4.1 / 15

Create-or-Update Ergonomics 1.1 / 10

Agent readiness — 30/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 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

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 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/.

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

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

7 more unmet checks in the Agent Readiness table above.

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

Operational Transparency scores 2.6 — up to +12.7 composite points
Contract Quality scores 58.8 — up to +10.3 composite points
Contract Governance scores 18.2 — up to +9.8 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/zeroentropy/apis.yml: open an issue on github.com/api-evangelist/zeroentropy 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 1

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.

OpenAPI

measured — observed by APIs.io (published)

APIs 7

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

ZeroEntropy Admin API

The Admin API from ZeroEntropy — 7 operation(s) for admin.

ZeroEntropy Collections API

The Collections API from ZeroEntropy — 3 operation(s) for collections.

ZeroEntropy Documents API

The Documents API from ZeroEntropy — 8 operation(s) for documents.

ZeroEntropy Models API

The Models API from ZeroEntropy — 2 operation(s) for models.

ZeroEntropy Queries API

The Queries API from ZeroEntropy — 3 operation(s) for queries.

ZeroEntropy Status API

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

ZeroEntropy Usage API

The Usage API from ZeroEntropy — 6 operation(s) for usage.

Scroll for all 7

Open Collections 7

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

ZeroEntropy Admin API

OPEN COLLECTION

ZeroEntropy Admin Collections API

OPEN COLLECTION

ZeroEntropy Admin Documents API

OPEN COLLECTION

ZeroEntropy Admin Models API

OPEN COLLECTION

ZeroEntropy Admin Queries API

OPEN COLLECTION

ZeroEntropy Admin Status API

OPEN COLLECTION

ZeroEntropy Admin Usage API

OPEN COLLECTION

Scroll for all 7

Agent Skills 2

Packaged agent skills for driving this provider's APIs from an AI assistant.

zeroentropy-rerank-results

AGENT SKILL

zeroentropy-search-collection

AGENT SKILL

ZeroEntropy API pricing

Prices published by ZeroEntropy, read 2026-10-07 from www.zeroentropy.dev/pricing.

Plan	Price
zerank-2	$0.025/ MM Tokens Includes: Weights available on HuggingFace; Self-serve with Slack community support
zembed-1	$0.050/ MM Tokens Includes: State-of-the-art embedding model; Weights available upon request; White glove fine-tuning and evalua
ze on-prem	Contact Us Includes: Model licensing and deployment; White glove and priority support; Optional evaluations and fine-tuni
Search API Pay-As-You-Go	OCR: $1.75/ 1,000 pages Includes: Indexing: $0.50 / MB; Storage: $0.10 / MB / month; Queries: $1.50 / TB queried; Reranking: $0.025 /
Enterprise	Contact Us Includes: Volume discounts; On-premises deployment within your VPC; 99.99% SLA; White-glove onboarding

Plan details, limits and sources →

Billed by: mm tokens · FinOps profile →

Pricing Plans 1

Published pricing tiers and plan structures.

Zeroentropy Plans Pricing

5 plans

PLANS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

ZeroEntropy

SLA

FinOps 1

Cost, billing, and metering signals for API financial operations.

Zeroentropy Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

ZeroEntropy API Rules

59 rules · 46 errors 11 warnings 2 info

SPECTRAL

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.

Zeroentropy Openapi Overlay

3 actions · update · zeroentropy-openapi.json

GENERATED

Security Posture 3

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

Zeroentropy Authentication

http · 1 scheme

SECURITY

Zeroentropy Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Zeroentropy Trust Center

SOC 2, HIPAA

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Quickstart

Quickstart

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Build 3

SDKs, sample code, and the tooling you integrate with

Packages

Packages

SDKs

SDKs

GitHubOrganization

GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

TrustCenter

Compliance

DomainSecurity

Authentication

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Source (apis.yml)

aid: zeroentropy
name: ZeroEntropy
description: ZeroEntropy builds specialized, lightweight AI models for information retrieval and retrieval-augmented generation
  (RAG). Its zerank rerankers and zembed embedding models improve the accuracy of any search pipeline, and its hosted retrieval
  API lets developers create collections, index documents, and run relevance queries (top documents, pages, and snippets)
  with metadata filtering. The API is a versioned (/v1) HTTP JSON service with US and EU data-center endpoints, official Python
  and TypeScript SDKs, and API-key bearer authentication. ZeroEntropy is a portfolio company of Initialized Capital operating
  in the enterprise AI / search sector.
url: https://raw.githubusercontent.com/api-evangelist/zeroentropy/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- initialized-capital
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
image: https://zeroentropy.dev/assets/images/ze-logo.png
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-17
x-docs-hosting: vercel
tags:
- Company
- Enterprise Saas
- Artificial Intelligence
- Search
- Retrieval
- Embeddings
- Reranking
- RAG
apis:
- aid: zeroentropy:zeroentropy-admin-api
  name: ZeroEntropy Admin API
  description: The Admin API from ZeroEntropy — 7 operation(s) for admin.
  humanURL: https://docs.zeroentropy.dev/api-reference/
  baseURL: https://api.zeroentropy.dev/v1
  tags:
  - Admin
  properties:
  - type: OpenAPI
    url: openapi/zeroentropy-admin-api-openapi.yml
  - type: Authentication
    url: authentication/zeroentropy-authentication.yml
  - type: Conventions
    url: conventions/zeroentropy-conventions.yml
  - type: Idempotency
    url: conventions/zeroentropy-conventions.yml
  - type: ErrorCatalog
    url: errors/zeroentropy-problem-types.yml
  - type: Conformance
    url: conformance/zeroentropy-conformance.yml
  - type: Lifecycle
    url: lifecycle/zeroentropy-lifecycle.yml
  - type: DataModel
    url: data-model/zeroentropy-data-model.yml
- aid: zeroentropy:zeroentropy-collections-api
  name: ZeroEntropy Collections API
  description: The Collections API from ZeroEntropy — 3 operation(s) for collections.
  humanURL: https://docs.zeroentropy.dev/api-reference/
  baseURL: https://api.zeroentropy.dev/v1
  tags:
  - Collection
  tags_raw:
  - Collections
  properties:
  - type: OpenAPI
    url: openapi/zeroentropy-collections-api-openapi.yml
  - type: Authentication
    url: authentication/zeroentropy-authentication.yml
  - type: Conventions
    url: conventions/zeroentropy-conventions.yml
  - type: Idempotency
    url: conventions/zeroentropy-conventions.yml
  - type: ErrorCatalog
    url: errors/zeroentropy-problem-types.yml
  - type: Conformance
    url: conformance/zeroentropy-conformance.yml
  - type: Lifecycle
    url: lifecycle/zeroentropy-lifecycle.yml
  - type: DataModel
    url: data-model/zeroentropy-data-model.yml
- aid: zeroentropy:zeroentropy-documents-api
  name: ZeroEntropy Documents API
  description: The Documents API from ZeroEntropy — 8 operation(s) for documents.
  humanURL: https://docs.zeroentropy.dev/api-reference/
  baseURL: https://api.zeroentropy.dev/v1
  tags:
  - Documents
  properties:
  - type: OpenAPI
    url: openapi/zeroentropy-documents-api-openapi.yml
  - type: Authentication
    url: authentication/zeroentropy-authentication.yml
  - type: Conventions
    url: conventions/zeroentropy-conventions.yml
  - type: Idempotency
    url: conventions/zeroentropy-conventions.yml
  - type: ErrorCatalog
    url: errors/zeroentropy-problem-types.yml
  - type: Conformance
    url: conformance/zeroentropy-conformance.yml
  - type: Lifecycle
    url: lifecycle/zeroentropy-lifecycle.yml
  - type: DataModel
    url: data-model/zeroentropy-data-model.yml
- aid: zeroentropy:zeroentropy-models-api
  name: ZeroEntropy Models API
  description: The Models API from ZeroEntropy — 2 operation(s) for models.
  humanURL: https://docs.zeroentropy.dev/api-reference/
  baseURL: https://api.zeroentropy.dev/v1
  tags:
  - Models
  properties:
  - type: OpenAPI
    url: openapi/zeroentropy-models-api-openapi.yml
  - type: Authentication
    url: authentication/zeroentropy-authentication.yml
  - type: Conventions
    url: conventions/zeroentropy-conventions.yml
  - type: Idempotency
    url: conventions/zeroentropy-conventions.yml
  - type: ErrorCatalog
    url: errors/zeroentropy-problem-types.yml
  - type: Conformance
    url: conformance/zeroentropy-conformance.yml
  - type: Lifecycle
    url: lifecycle/zeroentropy-lifecycle.yml
  - type: DataModel
    url: data-model/zeroentropy-data-model.yml
- aid: zeroentropy:zeroentropy-queries-api
  name: ZeroEntropy Queries API
  description: The Queries API from ZeroEntropy — 3 operation(s) for queries.
  humanURL: https://docs.zeroentropy.dev/api-reference/
  baseURL: https://api.zeroentropy.dev/v1
  tags:
  - Query
  tags_raw:
  - Queries
  properties:
  - type: OpenAPI
    url: openapi/zeroentropy-queries-api-openapi.yml
  - type: Authentication
    url: authentication/zeroentropy-authentication.yml
  - type: Conventions
    url: conventions/zeroentropy-conventions.yml
  - type: Idempotency
    url: conventions/zeroentropy-conventions.yml
  - type: ErrorCatalog
    url: errors/zeroentropy-problem-types.yml
  - type: Conformance
    url: conformance/zeroentropy-conformance.yml
  - type: Lifecycle
    url: lifecycle/zeroentropy-lifecycle.yml
  - type: DataModel
    url: data-model/zeroentropy-data-model.yml
- aid: zeroentropy:zeroentropy-status-api
  name: ZeroEntropy Status API
  description: The Status API from ZeroEntropy — 1 operation(s) for status.
  humanURL: https://docs.zeroentropy.dev/api-reference/
  baseURL: https://api.zeroentropy.dev/v1
  tags:
  - Status
  properties:
  - type: OpenAPI
    url: openapi/zeroentropy-status-api-openapi.yml
  - type: Authentication
    url: authentication/zeroentropy-authentication.yml
  - type: Conventions
    url: conventions/zeroentropy-conventions.yml
  - type: Idempotency
    url: conventions/zeroentropy-conventions.yml
  - type: ErrorCatalog
    url: errors/zeroentropy-problem-types.yml
  - type: Conformance
    url: conformance/zeroentropy-conformance.yml
  - type: Lifecycle
    url: lifecycle/zeroentropy-lifecycle.yml
  - type: DataModel
    url: data-model/zeroentropy-data-model.yml
- aid: zeroentropy:zeroentropy-usage-api
  name: ZeroEntropy Usage API
  description: The Usage API from ZeroEntropy — 6 operation(s) for usage.
  humanURL: https://docs.zeroentropy.dev/api-reference/
  baseURL: https://api.zeroentropy.dev/v1
  tags:
  - Usage
  properties:
  - type: OpenAPI
    url: openapi/zeroentropy-usage-api-openapi.yml
  - type: Authentication
    url: authentication/zeroentropy-authentication.yml
  - type: Conventions
    url: conventions/zeroentropy-conventions.yml
  - type: Idempotency
    url: conventions/zeroentropy-conventions.yml
  - type: ErrorCatalog
    url: errors/zeroentropy-problem-types.yml
  - type: Conformance
    url: conformance/zeroentropy-conformance.yml
  - type: Lifecycle
    url: lifecycle/zeroentropy-lifecycle.yml
  - type: DataModel
    url: data-model/zeroentropy-data-model.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/zeroentropy-plans-pricing.yml
- type: CapabilityMap
  url: capabilities/zeroentropy-capability-edges.yml
  name: ZeroEntropy Business Capability Map
- type: X-MCPServerCandidate
  url: mcp/zeroentropy-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: Overlay
  url: overlays/zeroentropy-openapi-overlay.yaml
- type: Packages
  url: packages/zeroentropy-packages.yml
- type: SDKs
  url: packages/zeroentropy-packages.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/zeroentropy-llms.txt
- type: TrustCenter
  url: security/zeroentropy-trust-center.yml
- type: Compliance
  url: security/zeroentropy-trust-center.yml
- type: DomainSecurity
  url: security/zeroentropy-domain-security.yml
- type: Authentication
  url: authentication/zeroentropy-authentication.yml
- type: Website
  url: https://www.zeroentropy.dev/
- type: Documentation
  url: https://docs.zeroentropy.dev/
- type: APIReference
  url: https://docs.zeroentropy.dev/api-reference/
- type: Quickstart
  url: https://docs.zeroentropy.dev/quickstart
- type: SignUp
  url: https://dashboard.zeroentropy.dev/
- type: Pricing
  url: https://www.zeroentropy.dev/pricing
- type: Blog
  url: https://www.zeroentropy.dev/blog
- type: GitHubOrganization
  url: https://github.com/zeroentropy-ai
- type: TermsOfService
  url: https://www.zeroentropy.dev/terms
- type: PrivacyPolicy
  url: https://www.zeroentropy.dev/privacy
- type: Support
  url: mailto:founders@zeroentropy.dev
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 16
  pass: local-v1

ZeroEntropy API — frequently asked questions

Does ZeroEntropy have an API?

Yes. APIs.io lists 7 APIs from ZeroEntropy, including ZeroEntropy Admin API, ZeroEntropy Collections API and ZeroEntropy Documents API, and 4 more.

Is there an OpenAPI specification for the ZeroEntropy API?

Yes. APIs.io indexes 7 OpenAPI specifications for ZeroEntropy, each linked for download from this page.

How do I authenticate with the ZeroEntropy API?

ZeroEntropy uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Zeroentropy Authentication.

How much does the ZeroEntropy API cost?

ZeroEntropy publishes its prices; its zerank-2 plan is $0.025/ MM Tokens as of 2026-10-07. APIs.io lists 5 pricing plans for ZeroEntropy, with each plan's price, limits and inclusions under Pricing on this page.

Is the ZeroEntropy API ready for AI agents?

ZeroEntropy has a Kin Score of 52.9 out of 100 (developing) and an Agent Readiness score of 29.5 (agent-ready), scored by API Evangelist on 2026-11-06.

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