# the402.ai Sensitivity Analysis

> the402.ai Sensitivity Analysis is a paid API for AI agents from api.the402.ai, paid per call via x402, $0.158/call, status down (last checked 2026-09-15).

Performs sensitivity analysis on a given model or dataset, quantifying how input variable changes affect output results

## Facts

- Endpoint: POST https://api.the402.ai/v1/services/svc_fffda11262df4ee7/purchase
- Price: $0.158/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-the402-ai-17ba6f59
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sVoAN3kmyQ6b8_JxnxsnE

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 api-the402-ai-17ba6f59 -d '<json body>'
```

Example prompt: Run a sensitivity analysis on my pricing model and tell me which input variables — like cost, demand, and discount rate — have the biggest impact on the final profit output.

## When to prefer this

Choose this endpoint when you need to understand which input variables most influence model outputs, want to quantify parameter importance, or need to assess model robustness — especially within an agentic workflow that can handle x402 micropayments automatically.

## Known failure modes

- Invalid or missing model/dataset input returns 400 error
- Malformed parameter schema causes processing failure
- Insufficient input variable definitions prevent analysis
- Payment verification failure blocks service delivery
- Job processing timeout for large or complex models

## How this service works

Purchase: Sensitivity Analysis

## Output

Returns a sensitivity analysis report including ranked importance scores for each input variable, quantified impact metrics showing how output changes relative to input perturbations, and variance attribution data.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "id"
 ],
 "properties": {
  "id": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-the402-ai-17ba6f59/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.the402.ai](https://www.zero.xyz/host/api.the402.ai/llms.txt)