asterdex/aster-skills-hub/aster-api-auth-v3

Claude Code and agent skill by asterdex/aster-skills-hub

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EIP-712 signed requests for Aster Futures API v3. Nonce, signature payload, request format. Use when calling TRADE, USER_DATA, USER_STREAM, or MARKET_DATA.

Install

npx vskill@latest install asterdex/aster-skills-hub/aster-api-auth-v3

SKILL.md

Aster API Authentication

Base: https://fapi.asterdex.com. Signed: send timestamp (ms), signature; optional recvWindow (default 5000, ≤5000).

ParamDescription
userMain account wallet
signerAPI wallet
nonceCurrent time, microseconds
signatureEIP-712 (hex)

Nonce: Current system time in µs; invalid if ±~5s. Prefer monotonic (e.g. now_s×1e6 + sequence). Example: see reference.

Signing: (1) Param string: key=value, sort ASCII, all strings; include nonce, user, signer. (2) EIP-712: domain name "AsterSignTransaction", version "1", chainId 1666, verifyingContract "0x0000...0000"; type "Message", field "msg" = param string. (3) Encode typed data, sign with API wallet private key (ECDSA), hex. (4) Add signature to query or body; POST/DELETE: application/x-www-form-urlencoded. Security: Env vars for user, signer, key. GET /fapi/v3/time if clock skew.

Note on chainId 1666 (SEC-08): The chainId 1666 used in the EIP-712 signing domain is an off-chain signing identifier specific to AsterDex. It is NOT the Harmony ONE network chainId, even though Harmony uses the same number. This chainId is used exclusively for API request signing and has no relation to the on-chain deposit chainId (ETH=1, BSC=56, Arbitrum=42161). Do not confuse the two.

Payload shapes: reference.md.

Security

  • Security scanPassed, 90 of 100Pattern checks on the skill's files.
  • Model reviewPassed

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Source

Popularity

Repository stars
56
Repository forks
9
7-day trend score
20

Stars and forks are for the whole GitHub repository, not this skill alone. Refreshed 17 Mar 2026, 7 months ago.

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