08 — API Access

Prompts as infrastructure

REST API for prompt retrieval. Generate API keys. Fetch compiled prompts by slug in the format your app needs. Your prompt library becomes deployment-ready infrastructure.

Coming in Pro+

Why serve prompts via API

Prompts in code

Prompts hardcoded in your codebase. Every change requires a code commit, a PR review, and a deployment. Prompt iteration speed = deployment speed.

Prompts via API

Prompts served at runtime. Update a prompt in prompt-x, promote to production, and your app uses the new version immediately. No code changes required.

API endpoints

RESTful. JSON responses. Bearer token authentication. Rate-limited per plan.

GET/api/v1/prompts/{slug}

Fetch a prompt by slug. Returns the compiled version for your specified platform. Only production-status prompts are accessible.

Params: slug (required), platform (optional, default: raw)

GET/api/v1/prompts

List all production-status prompts in your library. Paginated, filterable by tags and platform.

Params: page, per_page, tags, platform

POST/api/v1/prompts/{slug}/compile

Compile a prompt on-demand for a specific platform. Pass variable values in the request body.

Params: slug (required), platform (required), variables (optional)

Example request

curl -H "Authorization: Bearer px_key_..." \
  "https://api.prompt-x.io/v1/prompts/onboarding-assistant?platform=claude"

{
  "slug": "onboarding-assistant",
  "platform": "claude",
  "version": 12,
  "status": "production",
  "compiled": "<role>Customer success specialist...</role>\n<task>..."
}

Use cases

Dynamic prompt serving

Your application fetches the latest production prompt at runtime. Update prompts without redeploying code. The API always returns the current production version.

Variable injection

Pass variable values in the API request. The compiled prompt returns with all variables replaced. Your app provides the context, prompt-x provides the structure.

Multi-platform routing

Request the same prompt compiled for different platforms. Route to Claude, GPT-4, or Gemini based on your application logic. One prompt, programmatic platform selection.

CI/CD integration

Validate prompt availability and status in your deployment pipeline. Ensure production prompts exist before deploying the code that depends on them.

Details

Pro+ plan — API access included
Generate and rotate API keys from the dashboard
Only production-status prompts are accessible via API
Variables can be passed at request time
Rate limits based on plan tier

Works with

Compilation

API returns compiled prompts in any target platform format.

Version control

API always serves the current production version.

Variables

Pass variable values in the API request body.

Your prompts, your API

Serve production prompts at runtime. Update without redeploying.

Start free.