Couchbase REST API
Couchbase REST API enables agents to perform distributed NoSQL document operations, N1QL/SQL++ queries, full-text search, and mobile data sync against a high-performance multi-service cluster.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
RBAC with fine-grained collection-level permissions. TLS enforced in Capella; must be manually configured for self-hosted. Certificate-based auth supported for strong mutual authentication. Audit logging available in Enterprise Edition.
⚡ Reliability
Best When
An agent requires a combination of key-value speed, SQL++ query flexibility, built-in full-text search, and mobile sync in a single distributed platform.
Avoid When
The agent's workload is simple CRUD-only or the operational overhead of a multi-service Couchbase cluster cannot be justified.
Use Cases
- • Execute SQL++ (N1QL) queries over JSON documents for agents that need familiar SQL semantics without a relational schema
- • Perform sub-millisecond key-value lookups and updates for session state, caching, or real-time personalization in agent workflows
- • Run full-text search queries with relevance ranking over document collections for agent knowledge retrieval
- • Sync data between a central Couchbase cluster and mobile/edge Couchbase Lite instances using Sync Gateway
- • Analyze large document collections with Couchbase Analytics (CBAS) service using SQL++ without impacting operational query latency
Not For
- • Pure time-series workloads at columnar scale — TimescaleDB or ClickHouse will significantly outperform Couchbase for append-only time-series analytics
- • Graph-centric workloads with deep multi-hop traversals where a native graph database (ArangoDB, Neo4j) provides better ergonomics
- • Lightweight or development-only use cases — Couchbase cluster setup overhead is significant compared to CouchDB or PocketBase
Interface
Authentication
RBAC is built into Couchbase Server — users are assigned roles at cluster, bucket, or collection level. Basic auth used for most REST API calls. TLS client certificates supported for mutual TLS auth. Couchbase Capella (cloud) uses API keys for programmatic access alongside RBAC. Token-based auth is not natively supported.
Pricing
Community Edition is free self-hosted but lacks XDCR, backup, and enterprise support. Capella managed cloud trial does not require a credit card. Production use requires Capella subscription or Enterprise Edition license.
Agent Metadata
Known Gotchas
- ⚠ N1QL queries require a primary index on the bucket; agents querying un-indexed buckets will receive errors or extremely slow responses — always verify index existence before querying
- ⚠ CAS (Compare-and-Swap) values must be preserved and re-submitted for optimistic locking; agents ignoring CAS will encounter silent overwrite races under concurrent access
- ⚠ The REST API has multiple service endpoints (Query, Search, Analytics, KV) on different ports (8093, 8094, 8095, 11210) — agents must route to the correct service port for each operation type
- ⚠ Couchbase buckets have a configurable RAM quota; exceeding quota causes eviction or write failures — agents performing bulk imports must monitor bucket memory usage
- ⚠ Sync Gateway (for mobile sync) has a separate API and auth model from the server REST API; agents integrating both must manage two authentication flows simultaneously
Alternatives
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Scores are editorial opinions as of 2026-03-07.