Apache Solr
Apache Solr is an open-source enterprise search platform built on Apache Lucene. It provides distributed indexing, replication, load-balanced querying, automated failover and recovery, and centralized configuration through SolrCloud. Solr exposes comprehensive REST/HTTP APIs for document indexing, full-text search with faceting and highlighting, schema management, collections management, and cluster operations. It is an Apache Software Foundation project used by major organizations for enterprise-scale search solutions.
Apache Solr publishes 8 API contracts indexed on the APIs.io network, including Cluster API, Collections API, Query API, and 5 more. Tagged areas include Enterprise Search, Full-Text Search, Lucene, Search, and SolrCloud.
The Apache Solr catalog on APIs.io includes 1 Spectral governance ruleset.
Apache Solr’s developer surface includes authentication, documentation, developer portal, getting-started guide, release notes, support, engineering blog, and 16 more developer resources.
What this lets a business do 1
Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →
Kin Score
Markets this provider is in provisional
The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.
| Market | Position | Depth | Registered MCP server | Declares compatibility |
|---|---|---|---|---|
| Search API (Elasticsearch / OpenSearch shape) | undeclared | - | - | - |
Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.
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.
APIs 8
Individual APIs this provider publishes, each with its own machine-readable definition.
Apache Solr Search API
The Solr Search API provides HTTP endpoints for full-text document search, including query parsers (Standard, DisMax, Extended DisMax), JSON Query DSL, faceting and JSON Facet A...
Apache Solr Indexing API
The Solr Indexing API provides HTTP endpoints for adding, updating, and deleting documents from the search index. It supports JSON, XML, CSV, and binary Solr formats via the /up...
Apache Solr Config API
The Solr Config API and Request Parameters API provide REST endpoints for managing Solr's solrconfig.xml settings at runtime without server restart, including request handler co...
Apache Solr Cluster API
Cluster status and properties
Apache Solr Collections API
The Solr Collections API provides REST endpoints for managing SolrCloud collections, shards, replicas, and aliases. It supports collection creation, deletion, modification, shar...
Apache Solr Query API
Search a collection
Apache Solr Schema API
The Solr Schema API provides REST endpoints for managing the schema of a Solr collection, including field types, fields, dynamic fields, and copy fields. The Managed Schema appr...
Apache Solr Update API
Index, update, and delete documents
Scroll for all 8
Open Collections 6
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Apache Solr HTTP Cluster API
OPEN COLLECTIONApache Solr HTTP Cluster Collections API
OPEN COLLECTIONApache Solr HTTP Cluster Query API
OPEN COLLECTIONApache Solr HTTP Cluster Schema API
OPEN COLLECTIONApache Solr HTTP Cluster Update API
OPEN COLLECTIONApache Solr HTTP API
OPEN COLLECTIONApache Solr API pricing
Not yet checked against Apache Solr's own pricing page. Compiled by API Evangelist on 2026-05-04; confirm before you rely on a figure. A free plan or tier is listed.
| Plan | Price |
|---|---|
| Free freemium | Free |
| Professional paid | Free |
| Enterprise enterprise | — |
Plan details, limits and sources →
Rate limits
- Free Tier Default: 10 requests per minute
- Free Tier Monthly Quota: 1000 requests per month
- Professional Tier Default: 100 requests per minute
Compiled by API Evangelist, not yet checked against Apache Solr's documentation. All 5 limits →
Pricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Apache Solr Rate Limits
RATE LIMITSService Levels 1
Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.
Apache Solr
SLAFinOps 1
Cost, billing, and metering signals for API financial operations.
Apache Solr Finops
FINOPSFeatures 9
Notable capabilities this provider offers.
Full-Text Search
Comprehensive full-text search with tokenization, stemming, synonyms, and relevance scoring.
SolrCloud
Distributed search and indexing with automatic sharding, replication, and ZooKeeper coordination.
Faceted Search
Dynamic faceting including field facets, range facets, pivot facets, and JSON Facet API.
Streaming Expressions
SQL-like streaming expressions for distributed corpus analytics and aggregations.
Dense Vector Search
Approximate nearest neighbor (ANN) search for AI/ML vector embeddings using HNSW algorithm.
Learning to Rank
Machine learning-based relevancy tuning with custom feature extraction and model training.
Real-Time Get
Near-real-time document retrieval before documents are committed to the index.
Spatial Search
Geographic and spatial search with distance filtering and bounding box queries.
SQL Interface
SQL query language with JDBC support for analytics tools like Zeppelin and R.
Scroll for all 9
Spectral Rules 1
Spectral governance rulesets for linting and validating these APIs.
Apache Solr API Rules
SPECTRALSecurity Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Use Cases 5
What developers build with this provider.
Enterprise Search
Unified enterprise search across documents, databases, web content, and file systems.
E-Commerce Product Search
Product catalog search with faceting, filtering, and recommendation engines.
Log Analytics
Log ingestion and search for operational intelligence and security analysis.
AI/ML Vector Search
Semantic and similarity search using dense vector embeddings from AI models.
Content Management Search
Full-text search backend for CMS platforms and digital asset management systems.
Integrations 7
Pre-built integrations with other platforms and tools.
Apache ZooKeeper
Distributed coordination service for SolrCloud cluster management and configuration.
Apache Kafka
Stream ingestion via Kafka connector for real-time document indexing.
Kubernetes
Solr Kubernetes Operator for cloud-native deployment and management.
Grafana
Metrics integration via Prometheus exporter for Solr cluster monitoring.
Apache Tika
Document parsing for indexing rich content like PDFs, Word documents, and HTML.
Apache NiFi
Data flow integration for automated document ingestion pipelines.
OpenNLP
Natural language processing integration for text analysis and named entity recognition.
Scroll for all 7
Resources
Get Started 2
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 4
SDKs, sample code, and the tooling you integrate with
Access & Security 4
Authentication, authorization, and security posture
Operate 3
Status, limits, changes, and where to get help
Commercial 4
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
Other 1
Properties that don't map to a standard resource type
Source (apis.yml)
Apache Solr API — frequently asked questions
Does Apache Solr have an API?
Yes. APIs.io lists 8 APIs from Apache Solr, including Apache Solr Search API, Apache Solr Indexing API and Apache Solr Config API, and 5 more.
Is there an OpenAPI specification for the Apache Solr API?
Yes. APIs.io indexes 5 OpenAPI specifications for Apache Solr, each linked for download from this page.
How do I authenticate with the Apache Solr API?
Apache Solr uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Apache Solr Authentication.
How much does the Apache Solr API cost?
APIs.io lists 3 pricing plans for Apache Solr, with each plan's price, limits and inclusions under Pricing on this page.
Is the Apache Solr API ready for AI agents?
Apache Solr has a Kin Score of 41.7 out of 100 (developing) and an Agent Readiness score of 19.6 (agent-aware), scored by API Evangelist on 2026-11-06.
Work with this as data
Every provider here is available over the APIs.io API and to AI agents over MCP.