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SpacePrompts

spaceprompts.com

From $5/mo Free plan WebAPIBrowser extension
Visit spaceprompts.com
Spec score 8.4 #3 of 25 in Prompting Tool

What it is

SpacePrompts is a prompt management platform for people and teams working with AI. It runs on the web, through an API, and with Chrome, Edge, and Firefox extensions. Users can save, organize, run, version, and reuse prompts. The Playground combines an editor, variables, model selection, and immediate runs. An Evaluator scores prompts, highlights weak areas, and gives improvement guidance. Every save creates a version that can be restored later. The prompt manager extension can turn highlighted webpage text into a prompt. Its token counter supports OpenAI, Claude, Gemini, and DeepSeek models, showing token counts and estimated costs. Pro and Team plans provide API access, limited to 60 requests per minute per key. Team workspaces add shared libraries, collaborative editing, and role permissions for up to five members. Free includes 50 prompts and daily usage limits; Pro is $5 a month billed annually, and Team is $9 a month billed annually.

Spec sheet

What it does
SpacePrompts manages, runs, versions, shares and retrieves AI prompts for individuals and teams.Read 15 Oct 2026 · spaceprompts.com
Product
SpacePrompts is a prompt management platform for saving, organizing, running, versioning, and reusing AI prompts.Read 4 Oct 2026 · spaceprompts.com
Intended users
The maker describes SpacePrompts as serving people and teams who work with AI, including designers, writers, marketers, and API automation users.Read 4 Oct 2026 · spaceprompts.com
API
The API can retrieve and run prompts, count tokens, and enhance prompts; access is available on Pro and Team plans and limited to 60 requests per minute per API key.Read 4 Oct 2026 · spaceprompts.com
Integrations
The privacy policy lists Google, GitHub, and Microsoft as OAuth providers for account authentication.Read 4 Oct 2026 · spaceprompts.com
Support
The site directs users to a contact form and says replies typically arrive within 24 hours.Read 15 Oct 2026 · spaceprompts.com
Founded
SourceForge lists the company as founded in 2025.Read 15 Oct 2026 · sourceforge.net
AI model token counter
The browser token counter supports OpenAI, Claude, Gemini, and DeepSeek models and shows token counts and estimated costs.Read 4 Oct 2026 · spaceprompts.com
AI tool integrations
The extension injects or reads prompts in ChatGPT, Claude, DeepSeek, Gemini, Copilot, Meta AI and Perplexity.Read 15 Oct 2026 · spaceprompts.com
API availability
REST API access is offered on Pro and Team plans through personal API keys.Read 15 Oct 2026 · spaceprompts.com
API documentation depth
The public reference documents authentication, base URL, rate limits, four endpoints, examples and response codes.Read 15 Oct 2026 · spaceprompts.com
API enhancement
The enhancement endpoint accepts prompt text up to 3,000 characters and returns an improved prompt.Read 15 Oct 2026 · spaceprompts.com
API execution
POST /prompts/run/{slug} runs a stored prompt against an optional query using SpacePrompts' default AI model.Read 15 Oct 2026 · spaceprompts.com
API rate limit
API keys are limited to 60 requests per minute and excess requests receive HTTP 429.Read 15 Oct 2026 · spaceprompts.com
API retrieval
GET /prompts/{slug} returns a prompt owned by the API-key holder and can return plain text or JSON.Read 15 Oct 2026 · spaceprompts.com
API token counter
The token-count endpoint supports OpenAI, Claude, Gemini, DeepSeek, Qwen and Llama model aliases.Read 15 Oct 2026 · spaceprompts.com
Authentication
Login supports email magic links plus Google, GitHub and Microsoft sign-in; the login page says data is never shared.Read 15 Oct 2026 · spaceprompts.com
Browser extensions
The prompt manager extension is available for Chrome, Edge, and Firefox and can save highlighted webpage text as a prompt.Read 4 Oct 2026 · spaceprompts.com
Browser support
The extension is available for Chrome, Firefox and Microsoft Edge and can save highlighted webpage text as a prompt.Read 15 Oct 2026 · spaceprompts.com
Evaluation
The Evaluator scores prompts, identifies weak areas, and offers guidance to improve them.Read 4 Oct 2026 · spaceprompts.com
Export
The library can be exported to JSON or Excel.Read 15 Oct 2026 · spaceprompts.com
Founder origin
The founder says SpacePrompts began after an API-automation project created too many difficult-to-track prompts.Read 15 Oct 2026 · spaceprompts.com
Import update
A June 14, 2026 release added JSON import for up to 300 prompts per file and raised character limits.Read 15 Oct 2026 · spaceprompts.com
Licence
AlternativeTo categorizes SpacePrompts as proprietary software rather than open source.Read 15 Oct 2026 · alternativeto.net
Limit: collaboration information
HyperStore says the available product information gives limited detail about collaboration features.Read 15 Oct 2026 · store.hypergpt.ai
Limit: pricing information
HyperStore says pricing and subscription details were not disclosed in the documentation it reviewed.Read 15 Oct 2026 · store.hypergpt.ai
Playground
The Playground lets users edit prompts, fill variables, choose a model and run prompts live.Read 15 Oct 2026 · spaceprompts.com
Praise: ease of use
ExtWise reports reviewers commonly describe the extension as clean, simple, lightweight and useful for daily work.Read 15 Oct 2026 · extwise.com
Praise: organization
ExtWise's analyzed reviews repeatedly praise saving, tagging, categorizing and searching prompts across devices.Read 15 Oct 2026 · extwise.com
Praise: retrieval
The sole SourceForge reviewer praised keeping prompts together and finding them quickly.Read 15 Oct 2026 · sourceforge.net
Privacy and security
The privacy policy says extension data is transmitted over HTTPS; the prompt manager extension syncs prompts to its servers and caches prompts and authentication tokens locally.Read 4 Oct 2026 · spaceprompts.com
Prompt evaluator
Its evaluator identifies weaknesses such as vague rules, missing structure and absent length constraints, then suggests fixes.Read 15 Oct 2026 · spaceprompts.com
Prompt generation
AI generation can create a prompt from a plain description inside the create and edit flow.Read 15 Oct 2026 · spaceprompts.com
Prompt library
The service stores prompts in categories and tags and supports searching and reuse.Read 15 Oct 2026 · spaceprompts.com
Rating on Chrome Web Store
5.0 out of 5 from 8 reviewsRead 15 Oct 2026 · chromewebstore.google.com
Rating on ExtWise
5.0 out of 5 from 8 reviewsRead 15 Oct 2026 · extwise.com
Rating on HyperGPT HyperStore
5.0 out of 5 from 3 reviewsRead 15 Oct 2026 · store.hypergpt.ai
Rating on SourceForge
5.0 out of 5 from 1 reviewRead 15 Oct 2026 · sourceforge.net
Reference images
Prompts can include uploaded reference images.Read 15 Oct 2026 · spaceprompts.com
Scheduler update
A March 30, 2026 release added scheduled prompt runs, model-key management and passwordless authentication.Read 15 Oct 2026 · spaceprompts.com
Team collaboration
Team accounts provide a shared library, collaborative editing, invitations and Admin, Editor or Viewer roles.Read 15 Oct 2026 · spaceprompts.com
Team roles
Team workspaces support role-based permissions, and the team plan includes up to five members.Read 4 Oct 2026 · spaceprompts.com
Token counter privacy
The token counter extension sends prompt text to the SpacePrompts API for token counting and says it does not store or retain the text after returning the response.Read 4 Oct 2026 · spaceprompts.com
Version control
Each saved edit becomes a version that can be browsed and rolled back.Read 15 Oct 2026 · spaceprompts.com
Versioning
Every save creates a prompt version, and users can roll back to an earlier version.Read 4 Oct 2026 · spaceprompts.com

Plans and prices

Free Free 50 prompts · 3 enhancements/day · 3 generations/day · 3 Playground runs/day · BYOK · version history · Chrome extension · JSON/Excel export Read 15 Oct 2026 · spaceprompts.com
Pro $5 a month $60 billed annually (Save $48) Unlimited prompts · 300 enhancements/month · 300 generations/month · 300 Playground runs/month · custom fields · API access · public sharing · priority support Read 15 Oct 2026 · spaceprompts.com
Team $9 a month $108 billed annually (Save $72) Everything in Pro · up to 5 members · shared library · collaborative editing · role-based permissions · dedicated onboarding Read 15 Oct 2026 · spaceprompts.com

Every SpacePrompts plan and price →

Strong points and limits

Strong points

  • Web, API, and browser-extension access
  • Playground includes variables and model selection
  • Evaluator scores prompts and suggests improvements
  • Version history supports rollback
  • Team roles and shared libraries available

Limits

  • Free plan limits prompts and daily actions
  • API access requires Pro or Team
  • Extensions sync prompts to SpacePrompts servers
  • API keys are limited to 60 requests per minute

Who it suits

SpacePrompts suits designers, writers, marketers, API automation users, and teams managing reusable AI prompts. It fits users who need prompt testing, version history, browser capture, or team permissions.

Verdict

SpacePrompts combines prompt storage, testing, evaluation, versioning, and browser capture in one service. Its free plan covers basic use, while paid plans add larger limits, API access, and team collaboration.

Where Specifiction places it

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