Api Endpoint

Safe to Send? L2 Transaction Check (Phoenix Zero Safe Check)

Boolean pre-flight check for L2 transaction safety across all 12 chains (?chain= param, default: base). Returns safe=true/false with reason code. Revert ratio data available for Base and Arbitrum only (eth_getBlockReceipts); other chains use RTT-only analysis. Optimized for high-frequency agent calls.

Open interactive test console

Offering

Provider: rtt.phoenix-ai.work
Method: GET
Offering type: Api Endpoint
Transport type: http
Category: Blockchain And Crypto
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://rtt.phoenix-ai.work/api/v1/safe
MIME type: Not provided
First seen: 2026-10-16T01:50:10.647Z
Last seen: 2026-11-02T17:23:49.906Z
Tags: safe-to-send, Transaction, Gas, RPC, chain-health, Base, Arbitrum, optimism, Agents, l2, safe, pre-flight, boolean

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.01 USDC
Atomic price: 10000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2: 0.01 USDC
Atomic price: 10000 · Network: eip155:137 · Asset: USDC · Scheme: exact
Payment option 3: 0.01 USDC
Atomic price: 10000 · Network: eip155:42161 · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "payTo": "0xbb967F16C7f3e9B4c1626680684445d41dBE44Ab"
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "10000",
    "payTo": "0xbb967F16C7f3e9B4c1626680684445d41dBE44Ab"
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "10000",
    "payTo": "0xbb967F16C7f3e9B4c1626680684445d41dBE44Ab"
  }
]

Observed health

Status: Healthy
Latest latency: 139 ms
Average latency: 1035 ms
HTTP status: 402
Last checked: 2026-11-02T17:23:49.901Z
Reachability: 100% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET",
        "HEAD",
        "DELETE"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {}
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "method": {
          "enum": [
            "GET",
            "HEAD",
            "DELETE"
          ],
          "type": "string"
        },
        "queryParams": {
          "properties": {},
          "type": "object"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "properties": {
            "chain": {
              "description": "Chain checked (default: base, supports all 12)",
              "type": "string"
            },
            "p99_ms": {
              "description": "Sequencer P99 RTT in milliseconds",
              "type": "number"
            },
            "reason": {
              "enum": [
                "ok",
                "elevated_revert",
                "high_revert",
                "elevated_latency",
                "high_latency",
                "sequencer_stall",
                "data_stale"
              ],
              "type": "string"
            },
            "revert_data_available": {
              "description": "True if revert ratio is measured for this chain (Base and Arbitrum only)",
              "type": "boolean"
            },
            "revert_ratio": {
              "description": "Transaction revert ratio (0.0-1.0). null for chains without revert data.",
              "type": "number"
            },
            "safe": {
              "description": "true = safe to execute L2 transaction now",
              "type": "boolean"
            }
          },
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}