Dev Environment Layer · Behavior-Learned Service Virtualization · Deterministic by Default
Local digital twins of third-party APIs — built from real traffic.
TwinBridge™ eliminates external dependency drag. When vendor sandboxes are slow, rate-limited, or down, developers keep shipping by running an executable twin locally with zero latency and deterministic replay.
Why teams buy TwinBridge
Replace external dependencies with governed, reproducible local twins. Stop waiting on vendor sandboxes and stabilize CI.
Offline-first
Build and test without internet or sandbox uptime.
Deterministic
Same request → same response (strict mode).
CI-native
Repeatable pipelines; no vendor flakes.
# Typical workflow
twinbridge capture --target https://api.vendor.com --out captures/vendor.tbcap
twinbridge build --capture captures/vendor.tbcap --out twins/vendor/
twinbridge validate --twin twins/vendor/
twinbridge run --twin twins/vendor/ --port 8080
Trusted by design
Twins are treated as managed infrastructure artifacts: versioned, hashable, schema-validated, optionally signed.
- No production interception
- No outbound calls at runtime
- PII redaction at capture by default
- Manifest + hashes for integrity
- Ed25519 signing + key rotation support (enterprise)
What TwinBridge is
Observe real API interactions and synthesize a local, executable twin that captures behavior specs miss: error modes, validation quirks, timing, pagination, and webhook flows.
- Learned from real traffic (dev/staging)
- Executable runtime (localhost or CI)
- Deterministic replay (default)
- Diffable changes when vendors change behavior
What TwinBridge is not
TwinBridge is infrastructure, not test fiction.
- Not a static mock server
- Not a synthetic data generator
- Not a production relay, MITM, or gateway replacement
- Not autonomous fuzzing (v1)
FAQ (quick answers)
No. TwinBridge learns from observed traffic. Specs can help documentation, but they are not required for fidelity.
No. TwinBridge is for dev/staging capture and local/CI execution. Production interception is explicitly out of scope.
Capture includes default redaction and token masking. Enterprises can enforce policy gates and signed artifacts with trust roots.
Yes. Strict determinism is the default mode.