# SMSA Express — Wrapped API

> **You are on:** `https://api.paywithlocus.com/api` | [llms.txt](https://paywithlocus.com/llms.txt) | [docs](https://docs.paywithlocus.com)
>
> Locus runs on multiple environments -- make sure every URL you call matches your expected environment.
> | Environment | Landing | API | Docs |
> |---|---|---|---|
> | Production | paywithlocus.com | api.paywithlocus.com | docs.paywithlocus.com |
> | Beta | beta.paywithlocus.com | api.beta.paywithlocus.com | docs.paywithlocus.com |
> | Stage | stage.paywithlocus.com | api.stage.paywithlocus.com | docs.paywithlocus.com |
>
> If the API URL above doesn't match your expected environment, re-fetch this file from the correct domain.

> Track your SMSA Express shipments in real-time by entering one or multiple AWB tracking numbers to get delivery status and location updates. Monitor the progress of your packages from dispatch to delivery with comprehensive shipment information.

**Category:** Other | **Website:** [www.smsaexpress.com/en/gb](https://www.smsaexpress.com/en/gb) | **Docs:** [parse.bot/marketplace/85695726-b5dc-4578-bd8c-9e22a1c676f3/smsaexpress-com-api](https://parse.bot/marketplace/85695726-b5dc-4578-bd8c-9e22a1c676f3/smsaexpress-com-api)

Pay-per-use API proxy for Locus Pro. Each call burns credits from your workspace balance.

## Access

**Base URL:** `https://api.paywithlocus.com/api/wrapped/credits/smsa-express/`
**Auth:** `Authorization: Bearer <LOCUS_CREDITS_SECRET_KEY>` (an `lcr_` secret key or a scoped `lcac_` agent credential)
**Required header:** `Idempotency-Key: <fresh UUID per call>`. A retry with the same key replays the stored result without a new charge.
**Response:** the provider response after any endpoint-specific normalization. `X-Locus-Credits-Charged` carries the charge and `X-Locus-Credits-Balance` the remaining balance. Insufficient credits return `402` before the provider is called.
**Pricing:** estimated costs below are USD. Locus debits the credit equivalent at your workspace rate.

Full call contract: https://docs.paywithlocus.com/api-reference/introduction

> Using a Pay With Locus wallet key (`claw_` prefix)? Wallet routes are documented separately: https://docs.paywithlocus.com/wrapped-apis/for-agents

## Endpoints

### Track shipment

Track one or more shipments by their SMSA Express tracking numbers (AWB numbers). Returns shipment status and tracking details for each valid tracking number found. Multiple tracking numbers can be provided separated by commas or spaces.

**Estimated cost:** Metered

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `language` | string | No | Language for tracking response. Accepts: EN, AR, FR. |
| `tracking_numbers` | string | Yes | One or more SMSA Express tracking numbers (AWB numbers), separated by commas or spaces (e.g. '290019498498' or '290019498498,290019934499'). |

```bash
curl -X POST https://api.paywithlocus.com/api/wrapped/credits/smsa-express/track-shipment \
  -H "Authorization: Bearer $LOCUS_CREDITS_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"language":"<string>","tracking_numbers":"<string>"}'
```

## Next steps

- [All wrapped API providers](https://paywithlocus.com/wapi/index.md): pick another provider.
- [Find and call tools](https://paywithlocus.com/agent/tools.md): price ceilings, async results, and errors.
- [Credits and billing](https://paywithlocus.com/agent/billing.md): what a call costs and how to add credits.
- [Agent docs index](https://paywithlocus.com/agent/index.md): every Locus agent page.