MCP Synapse v0.8.0

MCP Synapse v0.8.0 Release Notes

Summary

v0.8.0 expands MCP Synapse beyond the original provider set and turns the desktop runtime into a broader local-first gateway surface for both AI providers and arbitrary REST APIs.

Positioning:

Any API. Any model. One gateway. Full audit trail.

Highlights

Provider Wave 2

• Added Anthropic, Groq, Gemini, OpenRouter, DeepSeek, and xAI/Grok to the provider surface.
• Groq was runtime-tested directly during the milestone.
• Endpoint contamination fixes now prevent the local SSE bridge URL from being reused as a provider base URL.

REST Adapter

• Added Custom REST API as a new connection type.
• The REST adapter supports endpoint URL, auth mode, HTTP method, and response-field mapping.
• This is the first domain-agnostic snapshot source in the product surface.

Budget Enforcement

• Budget Guards now support monitor, block, and throttle modes.
• Enforcement is explicit and user-configured.
• No hidden retry, fallback, or silent override behavior was introduced.

Auto-update

• Settings now includes Check for Updates.
• Update checks run through backend dispatch instead of direct frontend HTTP calls.
• Update flow remains user-controlled; there is no silent install path.

Bedrock Early Access

• Bedrock now appears in the Connections surface with an Early Access badge.
• The product explicitly states that Bedrock has not been runtime-tested by the development team.

Runtime Stability Fixes

• Fixed zombie port cleanup on shutdown.
• Fixed persisted startup state so saved connections no longer auto-start when the app opens.
• Fixed provider endpoint/base URL contamination from the local SSE bridge runtime URL.

Notes

• SHA256 hashes will be added to SHA256SUMS.txt after the release build is finalized.
• Sigstore remains the planned artifact integrity direction per D-038.

MCP Synapse v0.7.1

RELEASE NOTES - v0.7.1

Date: 2026-03-18
Channel: Early Access
Signing status: Unsigned (temporary)

Highlights

• Cost transparency is now explicit across the shipped usage surfaces:
  • litellm is the unified cost-normalization layer under D-040,
  • usage rows persist cost_source as ACTUAL, ESTIMATED, or UNKNOWN,
  • very small positive costs now render as <$0.0001 instead of misleading $0.0000.
• IDE-oriented copy-config UX is improved in the Connections details modal:
  • Cursor / Windsurf,
  • VS Code,
  • Other / Raw.
• Security hardening is tightened on the local-only path:
  • vault reads are metadata-only,
  • raw secret autofill is disabled,
  • error-path sanitization now redacts filesystem paths more aggressively.
• The documentation and compliance pack is now part of the public release surface:
  • refreshed guides/,
  • legal baseline under docs/legal/,
  • updated user-facing release notes and install guidance.
• Performance work from the release-hardening lane remains visible:
  • lazy import behavior stays in place,
  • startup memory guidance is documented with a 140 MB startup reference and a higher steady-state worker band accepted for the current lane.

Included in this release

• Cost normalization through litellm with local fallback behavior.
• Persisted cost_source data through pipeline, database, and usage views.
• Usage cost display refinement for very small positive values.
• IDE-specific config tabs in the Connections details modal.
• Cost-source hover details in the Usage surfaces.
• Vault metadata-only behavior and safer error redaction.
• Documentation pack completion across guides/, USER_GUIDE.md, and docs/legal/.

Security and trust notes

• Distribution remains unsigned in the current lane.
• SHA256 hashes are included in SHA256SUMS.txt.
• SmartScreen and unsigned-package guidance must remain visible while unsigned mode is active.

Deferred / known carry-forward items

• Bedrock remains coded but not runtime-proven because of the model-support mismatch and quota gap.
• Commercial code signing remains deferred to the post-revenue phase per D-038.
• Further memory optimization below the current accepted worker band remains a future slice.
• Claude Code CLI compatibility was not completed in M003/S05 due environment and budget constraints.

MCP Synapse v0.6.1 - Early Access

MCP Synapse v0.6.1 — Early Access

What changed in v0.6.1

• Worker-based execution now enabled by default — faster response, reduced UI blocking
• Provider imports lazy-loaded — lower startup memory footprint
• Connections: Bedrock removed from first-release scope
• Bedrock modal: dark-mode dropdown readability fix
• Credentials helper: Optional display sanitized
• Usage filters: dateRange/provider/sort now persist across restart

What's in this release

• Connection lifecycle (create, edit, start, stop, delete)
• Dashboard: KPI cards, cost trend, cost breakdown, health alerts
• Usage history with filters and CSV export
• Policy surfaces: Persona Lite, Optimizations
• Resilience surfaces: Budget Guards, Interceptors
• Local-first / BYOK credential model

Install

Download the installer below. Before running, verify SHA256:

PowerShell:
Get-FileHash -Algorithm SHA256 '.\MCP Synapse_0.6.1_x64-setup.exe'

Compare with SHA256SUMS.txt included in release assets.

SmartScreen Warning

This release is unsigned. Windows SmartScreen will show a warning.
To proceed: More info → Run anyway

Known Issues

1. Some Connection detail interactions can still feel slightly rough in specific paths.
2. RAM optimization ongoing — target steady below 200 MB.
3. MCP_SYNAPSE_PYTHON override validation hardening planned as follow-up.

Runtime safety note

If the worker path hits an error, the request falls back safely so normal operation continues.

Security

security@solidsynapse.com

MCP Synapse v0.6.0-rc.1 (Early Access)

MCP Synapse v0.6.0-rc.1 — Early Access

Provider-agnostic MCP control plane for managing connections, routing requests, and enforcing policies across AI
vendors.
Local-first, BYOK, deterministic execution.

What's in this release

• Connection lifecycle (create, edit, start, stop, delete)
• Dashboard: KPI cards, cost trend, cost breakdown, health alerts
• Usage history with filters and CSV export
• Policy surfaces: Persona Lite, Optimizations
• Resilience surfaces: Budget Guards, Interceptors
• Local-first / BYOK credential model

Install

Download the installer below. Before running, verify SHA256:

PowerShell:
Get-FileHash -Algorithm SHA256 .\MCP Synapse_0.6.0-rc.1_x64-setup.exe

Compare with SHA256SUMS.txt included in release assets.

SmartScreen Warning

This release is unsigned. Windows SmartScreen will show a warning.
To proceed: More info → Run anyway
Full explanation: docs/release/releases/v0.6.0-rc.1/UNSIGNED_NOTICE.md

Known Issues

The following items are known and tracked, but they are not release-blocking in this Early Access lane:

1. Some Connection detail interactions can still feel slightly rough in specific paths.
2. Worker-enabled memory usage optimization is not complete yet (target for a future optimization pass: steady RAM
   below 250 MB).
3. Additional hardening for MCP_SYNAPSE_PYTHON override validation is planned as a focused security follow-up.

Runtime safety note

If the worker path hits an error, timeout, or invalid response, the request falls back safely in the same request path
so normal operation can continue.

Security

security@solidsynapse.com