# Solana Rail Settlement Verification for Agents

> Solana Rail Settlement Verification for Agents is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-30).

Returns a machine-readable decision procedure for verifying whether a Solana transaction has finalized settlement before an agent writes off a receivable or disputes a reversal.

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/solana-rail-settlement-verification-for-agents?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: down
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/solana-rail-settlement-verification-for-agents-cc923d22
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_He-sn1eT_w4Fu01wDi7FX

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 solana-rail-settlement-verification-for-agents-cc923d22
```

Example prompt: Can you verify that the Solana transaction signature 5Yx3...ABC sent 100 USDC to wallet address GHJ...XYZ is finalized and settled — I need to confirm before writing it off as received?

## When to prefer this

Use this endpoint when an AI agent needs a structured, deterministic procedure to verify Solana SPL token (USDC or SOL) settlement before making a financial write-off decision or disputing a reversal. Prefer this over generic blockchain explorers when you need a machine-readable decision output with ordered checks (signature → finality → recipient match) specifically designed for autonomous agent workflows on the x402 payment rail.

## Known failure modes

- Transaction signature not found on-chain — RPC getTransaction returns null
- Block containing the transaction was skipped — signature exists but block is invalid
- Confirmation status is 'processed' or 'confirmed' rather than 'finalized' — insufficient for write-off
- Recipient address in the transaction does not match the claimed recipient
- Payment not received — returns 402 if the x402 payment was not included
- Network or RPC timeout causing inability to retrieve transaction data

## How this service works

Machine-readable decision procedure for verifying settlement on the Solana rail before an agent writes off a receivable or disputes a reversal. Inputs: claimed amount in SPL tokens (USDC or SOL), recipient address, transaction signature, expected settle window. Checks run in order: 1) signature validity via RPC getTransaction, confirm the tx exists and the block is not skipped; 2) confirmation status must be finalized, processed is not enough for write-off decisions; 3) recipient match, parse

## Output

A JSON object containing a boolean 'ok' field, a plain-prose 'brief' (120+ words) describing the settlement decision procedure, a 'procedure' field with the same content, a 'generationSource' (deterministic/llm/reasoning), a timestamp, and the service/provider slug. The prose walks through signature validity, finalization status, and recipient match in order.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "solana rail settlement verification for agents paid response",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "required": [
      "ok",
      "paid",
      "service",
      "provider",
      "result"
     ],
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "paid": {
       "type": "boolean"
      },
      "result": {
       "type": "object",
       "required": [
        "ok",
        "service"
       ],
       "properties": {
        "ok": {
         "type": "boolean",
         "description": "Handler success"
        },
        "brief": {
         "type": "string",
         "description": "Decision procedure prose for agents"
        },
        "model": {
         "type": "string"
        },
        "topic": {
         "type": "string"
        },
        "service": {
         "type": "string",
         "description": "Service slug"
        },
        "procedure": {
         "type": "string"
        },
        "generatedAt": {
         "type": "string",
         "description": "ISO-8601 timestamp"
        },
        "generationSource": {
         "enum": [
          "llm",
          "reasoning",
          "deterministic"
         ],
         "type": "string"
        }
       }
      },
      "payment": {
       "type": "object",
       "properties": {
        "code": {
         "type": "string"
        },
        "payer": {
         "type": "string"
        },
        "detail": {
         "type": "string"
       
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "paid": true,
  "result": {
   "ok": true,
   "brief": "plain prose decision procedure (120+ words)",
   "model": "deepseek/deepseek-v4-flash-0731",
   "topic": "string topic",
   "service": "solana-rail-settlement-verification-for-agents",
   "procedure": "same as brief",
   "generatedAt": "2026-01-01T00:00:00.000Z",
   "generationSource": "deterministic"
  },
  "service": "solana-rail-settlement-verification-for-agents",
  "provider": "K-2SO"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/solana-rail-settlement-verification-for-agents-cc923d22/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from k2so.wrong.systems](https://www.zero.xyz/host/k2so.wrong.systems/llms.txt)