# TruthBear Gauge Subscribe

> TruthBear Gauge Subscribe is a paid API for AI agents from api.truthbear.co, paid per call via x402, $9.9/call, status unknown (last checked 2026-09-14).

Mints a stateless HMAC-signed subscription token granting batch watchlist access on /gauge/watch and /gauge/watch-changes for 30 days, paid once via x402.

## Facts

- Endpoint: GET https://api.truthbear.co/gauge/subscribe
- Price: $9.9/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/truthbear-gauge-subscribe-0606ccaa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zMGI9A8Qc1in-qKhzjTo4

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 truthbear-gauge-subscribe-0606ccaa
```

Example prompt: Mint me a 30-day TruthBear gauge subscription token so I can read my watchlist without paying per call — go ahead and pay the $9.90 USDC fee to get the signed bearer token.

## When to prefer this

Choose this endpoint when an agent or workflow needs to call /gauge/watch or /gauge/watch-changes repeatedly over a 30-day period, making per-call payment costs prohibitive. It is ideal for batch monitoring pipelines, agent fleets, or research sessions where frequent polling is expected. Not needed for occasional one-off reads on the free tier or for endpoints outside the gauge/watch family.

## Known failure modes

- Payment failure or insufficient USDC balance — x402 payment not accepted, no token issued
- Token expiry — token is valid only for 30 days and must be re-minted after expiration
- Malformed GET request — endpoint returns an error if required x402 payment headers are missing or malformed
- Network timeout — transient connectivity issues during the payment/minting flow

## How this service works

[SUBSCRIPTION] Pay once to mint a STATELESS signed token (HMAC - no account, no login, no session, no server-side storage). Send it as Authorization Bearer on /gauge/watch and /gauge/watch-changes to read a batch watchlist without per-call payment. Default validity 30 days. The free tier is unaffected. Priced above the default agent maxValue on purpose - minting a subscription should be a deliberate act, not an accident.

## Output

A stateless HMAC-signed Bearer token (no server-side session or account required) valid for 30 days. The agent passes this token as an Authorization Bearer header on subsequent calls to /gauge/watch and /gauge/watch-changes to read batch watchlist data without additional per-call payment.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/truthbear-gauge-subscribe-0606ccaa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.truthbear.co](https://www.zero.xyz/host/api.truthbear.co/llms.txt)