# Delx EVM Batch Gas Sum

> Delx EVM Batch Gas Sum is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Computes the total gas and fee ceiling for a batch of EVM transactions in a single preflight calculation.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/evm-batch-gas-sum
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-evm-batch-gas-sum-38434a26
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_y-XGuIZLD9f3FHugNFMzz

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability delx-evm-batch-gas-sum-38434a26 -d '<json body>'
```

Example prompt: Before I submit these 5 Ethereum transactions as a batch, calculate the total gas and fee ceiling so I know my budget — here are the transaction objects.

## When to prefer this

Use this endpoint when an agent needs to preflight a batch of EVM transactions before submission to estimate total gas spend and fee ceiling in a single call. Prefer it over individual per-transaction gas estimates when you have multiple transactions and need an aggregated budget figure. Ideal for agent workflows that must validate gas budget before committing to on-chain execution, especially when privacy matters since no data is retained.

## Known failure modes

- Batch exceeds 256 transaction limit — request rejected
- Individual transaction object exceeds 128 properties — validation error
- Malformed transaction objects — parsing failure or unexpected results
- Missing or empty transactions array — error response
- Network timeout on large batches approaching the 256-item limit

## How this service works

EVM Batch Gas Sum: EVM Batch Gas Sum sums gas limits and fee ceilings across a transaction batch from bounded caller-supplied values without an external provider. Call EVM Batch Gas Sum 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 Batch Gas Sum as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base…

## Output

Returns a JSON object with total_gas (integer sum of gas across all transactions), fee_ceiling_wei (string, maximum fee in wei), and transaction_count (integer). Also includes an evidence block confirming no data retention, the input SHA-256 hash, and zero external calls made during processing.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "transactions": {
   "type": "array",
   "items": {
    "type": "object",
    "maxProperties": 128,
    "additionalProperties": true
   },
   "maxItems": 256,
   "description": "Transactions supplied to EVM Batch Gas Sum; used only for this bounded calculation and processed in memory without retention."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "total_gas": 71000,
   "fee_ceiling_wei": "81000000000000",
   "transaction_count": 2
  },
  "schema": "delx/util-evm-batch-gas-sum/v1",
  "status": "pass",
  "evidence": {
   "retained": false,
   "input_sha256": "37fd9d992f36719b2a5335554b644d0245f5e690b6bf017cfb5b8cb21fe3dbde",
   "external_calls": 0
  },
  "operation": "evm_preflight:evm_batch_gas_sum"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-evm-batch-gas-sum-38434a26/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)