Apache CouchDB REST API
CouchDB REST API gives agents a fully HTTP-native document database with built-in replication, conflict resolution, and change feeds for offline-first and sync-heavy workflows.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
TLS must be configured manually in self-hosted deployments and is off by default. Basic auth sends credentials on every request — TLS is essential. No native API key or JWT support; service accounts with dedicated credentials recommended. Per-database ACLs provide some granularity but are coarser than modern RBAC systems.
⚡ Reliability
Best When
An agent needs reliable document sync across distributed or occasionally-connected nodes with automatic conflict resolution.
Avoid When
The workload demands high write throughput, complex aggregations, or strict relational integrity.
Use Cases
- • Replicate datasets between agent instances or edge nodes using CouchDB's built-in bi-directional replication protocol
- • Monitor real-time document changes via the _changes feed to trigger agent workflows on data mutations
- • Store and retrieve schema-free JSON documents with automatic revision tracking and conflict detection
- • Implement offline-capable agent pipelines where data is written locally and synced to a central CouchDB instance when connectivity resumes
- • Run MapReduce views to pre-aggregate documents for reporting without a separate ETL step
Not For
- • High-throughput OLAP analytics where a columnar database (ClickHouse, QuestDB) would be orders of magnitude faster
- • Complex relational queries with multi-table joins that require a SQL optimizer
- • Write-heavy workloads at Cassandra or ScyllaDB scale — CouchDB's MVCC write throughput is limited by single-node architecture
Interface
Authentication
Basic auth supported on every request. Session cookie auth available via /_session endpoint. Proxy auth allows delegating identity from a trusted reverse proxy. Per-database read/write permissions can be set via security documents. No built-in JWT or API key mechanism — agents typically use basic auth with dedicated service accounts.
Pricing
Apache CouchDB itself is fully open-source (Apache 2). IBM Cloudant is the primary managed offering. PouchDB provides a JavaScript-native compatible client.
Agent Metadata
Known Gotchas
- ⚠ Every document update requires the current _rev value; agents that cache _rev values will encounter 409 Conflict errors under concurrent access and must implement read-modify-write retry loops
- ⚠ The _changes feed can return the same sequence multiple times if a node restarts; agents must handle duplicate change events idempotently
- ⚠ Deleted documents retain a tombstone revision forever; agents querying for 'all documents' will include deleted tombstones unless explicitly filtered with include_docs and checking _deleted flag
- ⚠ MapReduce views are built lazily and may return stale data until rebuilt; agents requiring fresh aggregates must use stale=false which triggers a blocking index rebuild
- ⚠ CouchDB does not support server-side joins; agents querying related documents must issue multiple HTTP requests and join data client-side, which can be slow at scale
Alternatives
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Scores are editorial opinions as of 2026-03-06.