Avasis Agent Platform

Live 402 challenge

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

{
  "docs": "https://agents.avasis.ai/docs",
  "error": "payment_required",
  "payTo": "0x6264191D6dD5427435B5E829077842e130Ef1fc8",
  "status": "payment_required",
  "x402v2": "PAYMENT-REQUIRED header",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x6264191D6dD5427435B5E829077842e130Ef1fc8",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://agents.avasis.ai/v1/tip/base-gas?",
      "description": "Base (chain 8453) current gas price and fee tip for agents that send transactions: latest block number and age, base fee, eth_gasPrice, eth_maxPriorityFeePerGas and a suggested maxFeePerGas (2x base fee + priority), from one batched RPC call every 2 s. Long-poll with ?since=<seq>&wait=25. Prepaid meter price $0.0002/call (packs at /v1/meter); SSE at /v1/stream/tips.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "GET",
          "discoverable": true
        },
        "output": {
          "required": [
            "topic",
            "seq",
            "data"
          ],
          "properties": {
            "seq": {
              "type": "integer"
            },
            "data": {
              "type": "object"
            },
            "topic": {
              "type": "string"
            },
            "observedAt": {
              "type": "string"
            }
          }
        }
      },
      "maxAmountRequired": "2000",
      "maxTimeoutSeconds": 120
    }
  ],
  "network": "eip155:8453",
  "refunds": {
    "info": "https://agents.avasis.ai/v1/refund/info",
    "terms": "Failed delivery = not charged. Paid but not delivered = free re-delivery (3x, 72 h) or a refund to the paying address (14 days)."
  },
  "service": "Avasis Agent Platform",
  "charging": "Invalid input 400, not found 404, busy 503, timeout 504: never settled. Settled only after a 2xx, non-empty, valid response.",
  "endpoint": "GET https://agents.avasis.ai/v1/tip/base-gas",
  "howToPay": "x402 v2: retry with PAYMENT-SIGNATURE for the challenge in the PAYMENT-REQUIRED header. x402 v1: retry with X-PAYMENT for accepts[0] (exact, network base). Base USDC either way.",
  "priceUSDC": "0.002",
  "x402Version": 1,
  "availability": "ready",
  "also_available": {
    "how": "same x402 flow as this quote (USDC on Base, no account or API key); an unpaid GET on any url is a free quote",
    "items": [
      {
        "url": "https://agents.avasis.ai/v1/evm/gas-ops",
        "what": "EVM gas ops kit: Ethereum gas + Base gas fee tiers (slow/standard/fast/urgent), EIP-1559 next base fee, USD cost per tx and for your gas_limit, Base-vs-Ethereum pick, plus Solana slot / priority fees / SOL-USD; one shot, $0.05",
        "price_usd": "0.05",
        "free_sample": "https://agents.avasis.ai/v1/evm/gas-ops/sample"
      },
      {
        "url": "https://agents.avasis.ai/v1/base/tx-precheck",
        "what": "Base tx precheck: simulate YOUR unsigned transaction before you sign (would it revert + reason, gas in USD, every transfer, approval exposure, counterparty risk): SIGN / CAUTION / BLOCK",
        "price_usd": "0.02",
        "free_sample": "https://agents.avasis.ai/v1/evm/tx-precheck/sample"
      }
    ],
    "ladder": "$0.002 one chain tip (this quote) -> $0.05 EVM gas-ops kit https://agents.avasis.ai/v1/evm/gas-ops (fee tiers + USD cost of your gas_limit) -> $0.02 Base tx-precheck https://agents.avasis.ai/v1/base/tx-precheck (before you sign) -> $0.02 https://agents.avasis.ai/v1/base/tx-receipt | $0.02 https://agents.avasis.ai/v1/base/erc20-allowance | $0.02 https://agents.avasis.ai/v1/base/multi-balance (after you send / approvals / balances); free samples https://agents.avasis.ai/v1/evm/{tx-precheck,tx-receipt,erc20-allowance,multi-balance}/sample"
  },
  "exampleResponse": {
    "seq": 812,
    "data": {
      "gwei": {
        "baseFee": 0.0021,
        "gasPrice": 0.0031,
        "maxPriorityFee": 0.001,
        "suggestedMaxFee": 0.0052
      },
      "chain": "base",
      "chainId": 8453,
      "blockNumber": 37400000,
      "blockAgeSeconds": 1
    },
    "ageMs": 420,
    "stale": false,
    "topic": "base-gas",
    "changed": true,
    "observedAt": "2026-10-29T12:00:00.000Z"
  },
  "supported_payment_networks": [
    "base"
  ]
}

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": "0x6264191D6dD5427435B5E829077842e130Ef1fc8",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 120
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {}
      },
      "output": {
        "type": "json",
        "example": {
          "seq": 812,
          "data": {
            "gwei": {
              "baseFee": 0.0021,
              "gasPrice": 0.0031,
              "maxPriorityFee": 0.001,
              "suggestedMaxFee": 0.0052
            },
            "chain": "base",
            "chainId": 8453,
            "blockNumber": 37400000,
            "blockAgeSeconds": 1
          },
          "ageMs": 420,
          "stale": false,
          "topic": "base-gas",
          "changed": true,
          "observedAt": "2026-10-29T12:00:00.000Z"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "properties": {
                "wait": {
                  "type": "integer",
                  "maximum": 25,
                  "minimum": 0,
                  "description": "long-poll: seconds to wait for a newer value (0..25); with a prepaid token an unchanged answer is free"
                },
                "since": {
                  "type": "integer",
                  "minimum": 0,
                  "description": "long-poll: the seq you already have; answers as soon as a newer value exists"
                }
              },
              "additionalProperties": false
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "topic",
                "seq",
                "data"
              ],
              "properties": {
                "seq": {
                  "type": "integer"
                },
                "data": {
                  "type": "object"
                },
                "topic": {
                  "type": "string"
                },
                "observedAt": {
                  "type": "string"
                }
              }
            }
          }
        }
      }
    }
  },
  "builder-code": {
    "info": {
      "a": "bc_d5i1omim"
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "a": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "App builder code"
        },
        "s": {
          "type": "array",
          "items": {
            "type": "string",
            "pattern": "^[a-z0-9_]{1,32}$"
          },
          "maxItems": 11,
          "description": "Service builder codes"
        },
        "w": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "Wallet builder code"
        }
      },
      "additionalProperties": false
    }
  }
}

Provenance

Seen in the source catalog

2026-11-09 03:17Z

Last indexed by Roundhouse

2026-11-09 17:50Z

Last enriched (probe, favicon, geo)

2026-11-09 04:46Z

x402 version

2

Max timeout

120s

Liveness probe

HTTP 402