api402x.com

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "what": "Composes two checks: first resolves a vesting plan/stream by provider + plan_id (same lookup as GET /vesting-status, hedgey TokenVestingPlans or sablier SablierLockup) to get its beneficiary, token, and start/cliff/end schedule, then scans that beneficiary's FULL onchain transfer history for that token (chunked eth_getLogs against Base, all the way back to genesis) and flags any outgoing transfer that happened before the plan's cliff date -- the only fully onchain-provable early-sale signal (see the early_flag field: before_cliff is provable, unknown means the window between cliff and vesting end was not evaluated precisely, after_vesting_end is not suspicious by construction). This is a HEAVY, deep check, not a quick point-read like the other routes here: a cold run typically takes 60-150+ seconds. Required query parameters: provider and plan_id (same meaning and same values as GET /vesting-status).",
  "asset": "USDC",
  "error": "payment_required",
  "price": "$0.05",
  "accepts": [
    {
      "payTo": "0x63bc58472a8449eDd1d1af0B0c03cFc7c832Da2f",
      "price": "$0.05",
      "scheme": "exact",
      "network": "eip155:8453"
    },
    {
      "payTo": "0x63bc58472a8449eDd1d1af0B0c03cFc7c832Da2f",
      "price": {
        "asset": "0xfde4C96c8593536E31F229ea8F37b2Ada2699bb2",
        "extra": {
          "assetTransferMethod": "permit2"
        },
        "amount": "50000"
      },
      "scheme": "exact",
      "network": "eip155:8453"
    },
    {
      "payTo": "0x63bc58472a8449eDd1d1af0B0c03cFc7c832Da2f",
      "price": {
        "asset": "0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb",
        "extra": {
          "supportsEip2612": true,
          "assetTransferMethod": "permit2"
        },
        "amount": "50000000000000000"
      },
      "scheme": "exact",
      "network": "eip155:8453"
    }
  ],
  "example": "https://api402x.com/insider-early-sale-check?provider=hedgey&plan_id=2",
  "network": "eip155:8453",
  "openapi": "https://api402x.com/openapi.json",
  "how_to_pay": "x402: signed payment challenge is in the `payment-required` response header. No API key and no subscription — pay per call in USDC on Base.",
  "x402Version": 2,
  "free_preview": "https://api402x.com/insider-early-sale-check/preview",
  "authoritative": "payment-required header; this body is a duplicate for clients that read the body"
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xE606AE66542D4F1A56AA551841db41e3ECd26816",
    "amount": "50000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Provenance

Seen in the source catalog

2026-08-13 23:41Z

Last indexed by Roundhouse

2026-09-21 14:45Z

Last enriched (probe, favicon, geo)

2026-09-16 18:45Z

x402 version

2

Max timeout

300s

Liveness probe

HTTP 402