MCP for agents

Give your agent
the model catalogue.
Not the data dump.

Search a compact result set, inspect one model only when needed, then call it with your own JustAPI key. Less catalogue noise. More room for the actual task.

Connect an agent ↓Explore tools ↗︎

Progressive discovery

Only load what
the task needs.

01

Search compactly.

Start with five matching IDs, endpoints, capabilities and minimum prices.

→
02

Inspect on demand.

Request pricing, parameters or descriptions only for the shortlisted model.

→
03

Call explicitly.

The selected model stays explicit. JustAPI never silently swaps it for another.

Connect once

Browse first.
Add a key when ready.

The catalogue tools are public. Generation tools read Authorization: Bearer sk-... from the MCP connection—not from tool arguments.

A

No key · catalogue access

Connect only the URL. Search, inspect and compare models without credentials.

  • Search and filters
  • Pricing and cost estimates
  • Model compatibility
B

With key · model calls

Store your key in JUSTAPI_API_KEY and let the client construct the header.

  • Text generation
  • Image generation
  • Usage-based cost estimate
{
  "mcpServers": {
    "justapi": {
      "type": "http",
      "url": "https://justapi.ai/mcp/server",
      "headers": {
        "Authorization": "Bearer ${JUSTAPI_API_KEY}"
      }
    }
  }
}

Export JUSTAPI_API_KEY=sk-... locally. The examples reference the environment variable instead of embedding a real key.

Five focused tools

Small surface.
Useful decisions.

Tools are shaped around agent tasks rather than mirroring every field in the public pricing response.

search_models

Find the shortlist.

Search by task, provider, type, capability or endpoint. Returns 5 by default, 10 at most.

PUBLIC · READ ONLY
get_model

Open one record.

Choose summary, pricing, calling, capabilities, parameters or description sections.

PUBLIC · READ ONLY
compare_models

Compare real workloads.

Compare up to five IDs and estimate token, context, request or resolution-based costs.

PUBLIC · READ ONLY
generate_text

Call one text model.

Uses the compatible Chat Completions or Anthropic Messages shape and returns only useful output.

REQUIRES KEY
generate_media

Generate an image.

Validates each model’s public parameters and accepts reference images only as HTTPS URLs.

REQUIRES KEY

Try asking

Prompts that start
with a decision.

Credential boundary

Your key stays a connection secret.

The MCP service reads the bearer key for the current request only. It is not accepted as a tool argument, persisted, logged or returned to the agent.