# List Supported AI Models with Pricing

> List Supported AI Models with Pricing is a paid API for AI agents from ask-session.withzero.ai, paid per call via MPP, price unknown, status unknown (last checked 2026-10-11).

Returns a list of supported AI models with per-million-token input/output costs and an estimated per-call cost based on 500/500 token assumptions with a 50% margin.

## Facts

- Endpoint: GET https://ask-session.withzero.ai/models?utm_source=zero.xyz
- Price: price unknown
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Provider: ask-session.withzero.ai
- Website: https://ask-session.withzero.ai
- Canonical page: https://www.zero.xyz/c/ask-session-withzero-ai-list-supported-ai-models-with-pricing-81c46168
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DaX5lJ9qQQJ_hM0hXoKQS

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability ask-session-withzero-ai-list-supported-ai-models-with-pricing-81c46168
```

Example prompt: Can you show me all the AI models available and their costs — both per-million tokens and the estimated cost per call?

## When to prefer this

Use this endpoint when you need to discover which AI models are available on the ask-session.withzero.ai platform and want to compare their costs before choosing a model for prompt execution. It is ideal for cost planning, model selection, and budget estimation prior to making parallel prompt calls.

## Known failure modes

- Service unavailable returns a 5xx error with no model list
- Empty or malformed JSON response if models list is not yet initialized
- Network timeout if the upstream provider is slow to respond

## How this service works

List supported models with per-million-token input/output costs and an estimated per-call cost (assumes ~500/500 input/output tokens with the 50% margin applied).

## Output

A JSON object listing all supported AI models, each with per-million-token input cost, per-million-token output cost, and an estimated per-call cost calculated assuming approximately 500 input tokens and 500 output tokens with a 50% margin applied.

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ask-session-withzero-ai-list-supported-ai-models-with-pricing-81c46168/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ask-session.withzero.ai](https://www.zero.xyz/host/ask-session.withzero.ai/llms.txt)