Endpoint: FIRESTORE_EMULATOR_HOST=localhost:24083.
Firestore agent testing
Firestore local testing for AI agents
Use LocalCloud when an agent needs to create, exercise, and reset Firestore resources without touching a real Google Cloud project. The same SDK shape points at localhost through FIRESTORE_EMULATOR_HOST=localhost:24083.
Endpoints: gRPC :24083.
Evidence state: partial; Local development coverage is partial. Known limits: Seed and browser parity is not fully hardened., Index/query behavior is unverified..
Registry default: off; assembled default: off (verified); minimum tier: community.
Persistence: volatile (verified). Documents do not have an audited persisted data directory in the assembled container
Route the SDK before writing code
Start LocalCloud, export FIRESTORE_EMULATOR_HOST=localhost:24083, and make the agent perform one Firestore operation before changing application logic. That catches accidental production routing early.
Prefer one representative behavior over broad smoke tests
A useful agent check creates local Firestore state, reads it back with the project SDK, and records which feature was covered. It should not require a GCP account, service-account key, or billing project.
Use only documented setup paths
Create deterministic state through a contract-documented seed registrar or through an operation listed on this page. Do not assume every service supports seed data, reset, or persistent state.
Copy-ready setup
Commands and prompts
Use these snippets as starting points, then keep the checks scoped to localhost until you intentionally validate against real Google Cloud.
Environment
eval "$(localcloud env)"
# Verify that the generated environment includes FIRESTORE_EMULATOR_HOST; do not replace a CLI-remapped value with a hard-coded port. Compatibility
Local check versus release validation
| Area | LocalCloud local check | Real GCP still needed for |
|---|---|---|
| SDK routing | FIRESTORE_EMULATOR_HOST=localhost:24083 points clients at localhost. | Production endpoint, auth, IAM, quota, and regional behavior. |
| Supported features | documents.create/read/update/delete (partial) — External emulator is available; seed and browser parity needs hardening.; queries/index behavior (partial) — Complex query/index parity is unverified. | Seed and browser parity is not fully hardened.; Index/query behavior is unverified. |
| Agent safety | No default cloud account, credentials, or billing project required. | Final release validation in the target GCP project. |
Use the sandbox deliberately
- Permitted workflows use local endpoint values and should stop rather than fall back to real Google Cloud or real credentials. The Public Preview License permits individuals and organizations, including for-profit companies, to use LocalCloud for non-production internal development, testing, CI, evaluation, and pilots.
- LocalCloud emulates bounded local development workflows. Validate application behavior against real Google Cloud before production deployment.
- Before production deployment, unset LocalCloud emulator environment variables and validate behavior against real Google Cloud.
- Local development coverage is partial. Known limits: Seed and browser parity is not fully hardened., Index/query behavior is unverified..
Keep the agent on the supported path
- Firestore service page — Service-specific supported and unsupported capability list.
- Compatibility matrix — Check current support boundaries before relying on a local-only test.
- Service catalog — Review every LocalCloud service, endpoint, and limitation.
- SDK examples — Use standard Google Cloud SDKs pointed at localhost.
- Seed data — Load deterministic fixtures for repeatable agent and CI runs.
Claims are tied to current sources
- LocalCloud service metadata — Reviewed 2026-08-26; implementation google-official.
- LocalCloud agentic facts reviewed 2026-08-26.