Vespa website screenshot

Vespa

Vespa is an Apache 2.0 open-source serving engine for big-data, vector search, and recommendations. It exposes a Document API (write/read), a Search API (query), and several admin endpoints. Vespa Cloud is the commercial managed offering.

Vespa publishes 2 APIs on the APIs.io network: Documents API and Visit API. Tagged areas include Vector Database, Search, Open Source, Real-Time, and Recommendations.

Vespa’s developer surface includes authentication, developer portal, pricing, engineering blog, and 11 more developer resources.

🌐 Visit website 📡 Source on GitHub
35.8/100 thin ▬ flat Agent 31/100 agent aware Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessApproval
4 APIs
Vector DatabaseSearchOpen SourceReal-TimeRecommendations

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 35.8/100 · thin
Contract Quality 13.4 / 25
Developer Ergonomics 4.3 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 2.7 / 13
Governance 0.0 / 12
Discoverability 7.4 / 10
Agent readiness — 31/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/vespa: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 4

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

Vespa Document API v1

The /document/v1 API supports GET, POST, PUT, and DELETE for documents, plus bulk visiting/iteration with continuation tokens, conditional writes (test-and-set using the documen...

Vespa Search API

The Vespa Search API accepts queries via YQL or structured query JSON over HTTP GET/POST. It powers full-text, vector, and hybrid retrieval with ranking expressions defined in t...

Vespa Documents API

Single-document GET, POST, PUT, DELETE operations

Vespa Visit API

Bulk visit (iteration) operations

Open Collections 1

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

Vespa Document API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Vespa Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Vespa Rate Limits

1 limits

RATE LIMITS

FinOps 1

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

Vespa Finops

FINOPS

Security Posture 3

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

Vespa Authentication

mutualTLS · 1 scheme

SECURITY

Vespa Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Vespa Vulnerability Disclosure

Intigriti · security.txt · contact published

SECURITY

Agentic Access 1

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

Vespa Agentic Access

6 operations · 3 acting

6 operations · 3 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Portal
Portal

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 LlmsText
LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

SourceCode
SourceCode

Access & Security 3

Authentication, authorization, and security posture

VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 Plans
Plans
 FinOps
FinOps

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

Vespa Cloud
CommercialOffering

Source (apis.yml)

apis.yml Raw ↑ 
aid: vespa
url: https://raw.githubusercontent.com/api-evangelist/vespa/refs/heads/main/apis.yml
name: Vespa
kind: opensource
description: Vespa is an Apache 2.0 open-source serving engine for big-data, vector search, and recommendations. It exposes
  a Document API (write/read), a Search API (query), and several admin endpoints. Vespa Cloud is the commercial managed offering.
accessModel:
  pricing: unknown
  onboarding: approval
  trial: false
  try_now: false
  public: false
  label: Requires approval
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/vespa.png
tags:
- Vector Database
- Search
- Open Source
- Real-Time
- Recommendations
created: '2026-05-08'
modified: '2026-05-08'
specificationVersion: '0.19'
apis:
- aid: vespa:vespa-document-api-v1
  name: Vespa Document API v1
  humanURL: https://docs.vespa.ai/en/document-v1-api-guide.html
  baseURL: http://{vespa_endpoint}/document/v1
  tags:
  - REST
  - Documents
  - CRUD
  - Visit
  description: The /document/v1 API supports GET, POST, PUT, and DELETE for documents, plus bulk visiting/iteration with continuation
    tokens, conditional writes (test-and-set using the document selector language), and upserts. Backpressure is signaled
    with 429 Too Many Requests.
  properties:
  - type: Documentation
    url: https://docs.vespa.ai/en/document-v1-api-guide.html
- aid: vespa:vespa-search-api
  name: Vespa Search API
  humanURL: https://docs.vespa.ai/en/query-api.html
  baseURL: http://{vespa_endpoint}/search/
  tags:
  - REST
  - Search
  - Query
  - YQL
  description: The Vespa Search API accepts queries via YQL or structured query JSON over HTTP GET/POST. It powers full-text,
    vector, and hybrid retrieval with ranking expressions defined in the application package.
  properties:
  - type: Documentation
    url: https://docs.vespa.ai/en/query-api.html
- aid: vespa:vespa-documents-api
  name: Vespa Documents API
  description: Single-document GET, POST, PUT, DELETE operations
  humanURL: https://docs.vespa.ai/en/document-v1-api-guide.html
  baseURL: http://{vespa_endpoint}/document/v1
  tags:
  - Documents
  properties:
  - type: OpenAPI
    url: openapi/vespa-documents-api-openapi.yml
- aid: vespa:vespa-visit-api
  name: Vespa Visit API
  description: Bulk visit (iteration) operations
  humanURL: https://docs.vespa.ai/en/document-v1-api-guide.html
  baseURL: http://{vespa_endpoint}/document/v1
  tags:
  - Visit
  properties:
  - type: OpenAPI
    url: openapi/vespa-visit-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/vespa-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/vespa-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/vespa-domain-security.yml
- type: Authentication
  url: authentication/vespa-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/vespa-ai
- type: Website
  url: https://vespa.ai/
- type: Portal
  url: https://docs.vespa.ai/
- type: SourceCode
  url: https://github.com/vespa-engine/vespa
- type: CommercialOffering
  title: Vespa Cloud
  url: https://cloud.vespa.ai/
- type: Pricing
  url: https://cloud.vespa.ai/price-calculator.html
- type: Plans
  url: plans/vespa-plans-pricing.yml
- type: RateLimits
  url: rate-limits/vespa-rate-limits.yml
- type: FinOps
  url: finops/vespa-finops.yml
- type: LlmsText
  url: https://docs.vespa.ai/llms.txt
- type: Blog
  url: https://blog.vespa.ai/feed.xml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com