| What it does | Free, open-source desktop and web app for Meta's Muse Code CLI
| Open-source API mock server for multiple protocols
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| Stage | Not given
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| Founded | Not given
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| Based in | IN
| US
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| Pricing model | Open source
| Freemium
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| Pricing | Free, MIT licensed, no paid tier, no trial, no seats, no account. Runs on your existing Muse Code subscription.
| Free: $0/month with 10,000 requests/month and local mocks only. Pro: $29/month with 250,000 requests/month, 100,000 platform AI tokens/month, and 3 hosted mocks. Team: $99/month with 1,000,000 requests/month, 1,000,000 platform AI tokens/month, and unlimited hosted mocks. Annual plans include 2 mont
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| Key features | - Projects and sessions grouped by working directory and git worktrees
- Resume sessions including those started in the terminal TUI
- Inline diffs in the thread at the turn that produced them
- Every agent approval surfaced and never bypassed
- Cost tracking at published API rates per thread
- Full keyboard navigation with command palette
- File viewer with source, Markdown, image, video and PDF preview
- Remote daemon support for running the agent on another machine
- VS Code extension available
- Native Windows support with PowerShell
| - Multi-protocol support (REST, gRPC, GraphQL, WebSocket, Kafka, MQTT and more)
- Realistic data synthesis with template tokens and faker fields
- Latency and fault injection for testing retries and fallbacks
- Record and replay for capturing and replaying live traffic
- Modern admin UI for managing servers, overrides and metrics
- Configuration as code with OpenAPI specs and YAML
- Local-first development without account requirement
- CI integration with local endpoints
- HTTP bridge exposing gRPC services over REST
- BYOK AI integration with user provider keys
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| What makes it different | - No additional cost or billing on top of existing Muse Code subscription
- Credentials stay with the muse CLI, never stored by Helicon
- Native Windows support without requiring WSL
- MIT licensed open-source with no company behind it
- Sessions and approvals never bypassed or batched
| - Multi-protocol mocking from one configuration file
- Realism-first simulation with data synthesis and failure injection
- Open source with permissive MIT or Apache-2.0 licensing
- Local-first approach with optional cloud collaboration
- Deploy to cloud hosting with a single command
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 11 ▼ −1 (down) since last check | 9 ● no change since last check |
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| Trust Flow (Majestic) | 14 | 0 |
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| Citation Flow (Majestic) | 27 | 17 |
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| Referring domains (Majestic) | 34 | 7 |
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Helicon
MockForge