EVM Gas Limit Headroom

Recent payments · which agents last used it

Every indexed settlement paid to this service’s wallet, newest first. The index does not record which endpoint a payment was for, so if this wallet serves more than one endpoint, the rows include payments for the others. Paged up to the newest 5,000; the full history is on the merchant page.

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": {
      "app": "Delx Commerce",
      "name": "USD Coin",
      "version": "2",
      "provider": "coinbase",
      "erc8004_id": "14340",
      "accept_label": "Coinbase CDP",
      "provider_label": "Coinbase CDP",
      "facilitator_url": "https://api.cdp.coinbase.com/platform/v2/x402"
    },
    "payTo": "0x9f8bd9875b3E0b632a24A3A7C73f7787175e73A2",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://api.delx.ai/api/v1/x402/evm-gas-limit-headroom",
    "description": "EVM Gas Limit Headroom: EVM Gas Limit Headroom calculates gas-limit headroom above an estimated gas amount from bounded caller-supplied values without an external provider. Call EVM Gas Limit Headroom before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for EVM Gas Limit Headroom as versioned deterministic JSON. Price: $0.001 U…",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "app": "Delx Commerce",
      "name": "USD Coin",
      "version": "2",
      "provider": "payai",
      "erc8004_id": "14340",
      "accept_label": "PayAI Base",
      "provider_label": "PayAI Base",
      "facilitator_url": "https://facilitator.payai.network"
    },
    "payTo": "0x9f8bd9875b3E0b632a24A3A7C73f7787175e73A2",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://api.delx.ai/api/v1/x402/evm-gas-limit-headroom",
    "description": "EVM Gas Limit Headroom: EVM Gas Limit Headroom calculates gas-limit headroom above an estimated gas amount from bounded caller-supplied values without an external provider. Call EVM Gas Limit Headroom before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for EVM Gas Limit Headroom as versioned deterministic JSON. Price: $0.001 U…",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "app": "Delx Commerce",
      "name": "USD Coin",
      "version": "2",
      "feePayer": "2wKupLR9q6wXYppw8Gr2NvWxKBUqm4PPJKkQfoxHDBg4",
      "provider": "payai",
      "erc8004_id": "14340",
      "accept_label": "PayAI Solana",
      "provider_label": "PayAI Solana",
      "facilitator_url": "https://facilitator.payai.network"
    },
    "payTo": "28heAMpFkeUJsL7o7apiK4oJwZWq2fUHinRwbgYYsemG",
    "amount": "1000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "mimeType": "application/json",
    "resource": "https://api.delx.ai/api/v1/x402/evm-gas-limit-headroom",
    "description": "EVM Gas Limit Headroom: EVM Gas Limit Headroom calculates gas-limit headroom above an estimated gas amount from bounded caller-supplied values without an external provider. Call EVM Gas Limit Headroom before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for EVM Gas Limit Headroom as versioned deterministic JSON. Price: $0.001 U…",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "gas_limit": 25200,
          "estimated_gas": 21000
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "result": {
            "sufficient": true,
            "headroom_gas": 4200,
            "headroom_fraction": 0.2
          },
          "schema": "delx/util-evm-gas-limit-headroom/v1",
          "status": "pass",
          "evidence": {
            "retained": false,
            "input_sha256": "dd71c79c3c5455d122b7167969700e4587770c75519ca55c82bfc04e7433381e",
            "external_calls": 0
          },
          "operation": "evm_preflight:evm_gas_limit_headroom"
        }
      }
    },
    "tags": [
      "base",
      "evm",
      "preflight"
    ],
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input",
        "output"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "type": "object",
              "$schema": "https://json-schema.org/draft/2020-12/schema",
              "required": [
                "estimated_gas",
                "gas_limit"
              ],
              "properties": {
                "gas_limit": {
                  "type": "integer",
                  "description": "Gas Limit supplied to EVM Gas Limit Headroom; used only for this bounded calculation and processed in memory without retention."
                },
                "estimated_gas": {
                  "type": "integer",
                  "description": "Estimated Gas supplied to EVM Gas Limit Headroom; used only for this bounded calculation and processed in memory without retention."
                }
              },
              "additionalProperties": false
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "type": "string",
              "const": "POST"
            },
            "bodyType": {
              "type": "string",
              "const": "json"
            }
          }
        },
        "output": {
          "type": "object",
          "properties": {
            "result": {
              "type": "object",
              "properties": {
                "sufficient": {
                  "type": "boolean"
                },
                "headroom_gas": {
                  "type": "integer"
                },
                "headroom_fraction": {
                  "type": "number"
                }
              },
              "additionalProperties": true
            },
            "schema": {
              "type": "string"
            },
            "status": {
              "type": "string"
            },
            "evidence": {
              "type": "object",
              "properties": {
                "retained": {
                  "type": "boolean"
                },
                "input_sha256": {
                  "type": "string"
                },
                "external_calls": {
                  "type": "integer"
                }
              },
              "additionalProperties": true
            },
            "operation": {
              "type": "string"
            }
          },
          "description": "Versioned bounded first-party JSON result with input evidence; caller data is processed in memory and not retained.",
          "additionalProperties": true
        }
      }
    },
    "summary": "EVM Gas Limit Headroom: EVM Gas Limit Headroom calculates gas-limit headroom above an estimated gas amount from bounded caller-supplied values without an external provider. Call EVM Gas Limit Headroom before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for EVM Gas Limit Headroom as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, stateless, memory-only execution with no paid upstream, live RPC, web search, credentials, custody, signing, media generator, or input retention. Honest limit: Uses caller-supplied values only; it performs no RPC call, signing, broadcasting, balance lookup, custody, trading, or live-chain claim. Advisory output only; the buyer owns authorization, payment policy, and production decisions.",
    "category": "chain-primitives-local",
    "serviceName": "EVM Gas Limit Headroom"
  }
}

Provenance

Seen in the source catalog

2026-08-18 19:00Z

Last indexed by Roundhouse

2026-09-17 18:30Z

Last enriched (probe, favicon, geo)

2026-09-23 05:45Z

x402 version

2

Max timeout

300s

Liveness probe

HTTP 402