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Grok+17 agentsStelar x402 Crypto Signals API
Pay-per-call crypto data over x402: grid params, market regime, telemetry. USDC on Base, no key.
Free
Stelar x402 Crypto Signals API
Example session with this skill installed
Call the Stelar telemetry endpoint without paying and show me exactly what one call costs and how to pay it.
- Read your context and instructions
- Compiled the stelar x402 crypto
Summary
GET https://api.stelardigital.com/telemetry without payment returns HTTP 402 with machine-readable payment terms: one base call costs $0.005 in USDC on Base.
The 402 challenge (as returned by the API)
www-authenticate: Payment id="fg80r7h0UyaqUGRa", realm="api.stelardigital.com", method="evm", intent="charge", request="<base64url-json>", expires="2026-08-30T22:10:12Z"
Key fields from the JSON body
| Field | Value | Meaning |
|---|---|---|
| network | eip155:8453 | Base mainnet |
| asset | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | USDC contract on Base |
| amount | 5000 | $0.005 at USDC's 6 decimals |
| payTo | 0x32d711C66dD1AD0c42D0cFe48e58ee5f2dE7c243 | recipient address |
| maxTimeoutSeconds | 300 | how long the challenge stays valid |
(id and expires differ on every call; adding ?depth=N raises amount to 50000, i.e. $0.05.)
Next steps
- Settle the exact amount to payTo with an x402-capable wallet, referencing the challenge id.
- Retry the same GET with payment proof attached: HTTP 200 returns the JSON data.
Honesty note: telemetry is the frozen record of a grid bot that stopped trading 2026-08-16, not a live feed.
Connects securely to your tools. The creator never sees your data.
About this skill
api.stelardigital.com is a pay-per-call API: no signup, no account, no API key. Every call costs cents, settled in USDC on Base (eip155:8453) via the x402 protocol.
Endpoints, from the API's own catalog:
- GET /gridparams ($0.05): grid count, spacing percent, price band, per-grid USD allocation for a pair and capital amount, from live 24h market structure
- GET /regime ($0.03): market regime (chop / uptrend / downtrend / high-volatility) plus a grid-trading suitability verdict
- GET /telemetry ($0.005 base): historical telemetry from Stelar Digital's retired grid bot. The bot stopped trading 2026-08-16; this endpoint serves its frozen record, not live activity. An optional depth param (1-1000) upgrades the price to $0.05.
Assets covered: SOL, XLM, BTC, ETH, XRP, DOGE, LTC, ADA. Every unpaid call returns HTTP 402 with exact payment terms in the WWW-Authenticate header; an x402-capable client settles and retries automatically. The attached SKILL.md pins the exact URLs and documents the full 402, pay, retry flow with a captured challenge.
How to install
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- 1
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- 2
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- 3
Ask your agent to use it
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