# Nomos Source of Funds Quick Assessment

> Nomos Source of Funds Quick Assessment is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-14).

Returns a rapid risk assessment and source-of-funds summary for an EVM wallet address on Ethereum or Base, covering activity, identity signals, and risk score.

## Facts

- Endpoint: POST https://base-agent-preflight.bytoken2023.workers.dev/x402/v1/wallet/source-of-funds/quick
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nomos-source-of-funds-quick-assessment-9ab1c6d4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MigfLJ1nB5ZBWhAiz2m6P

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 nomos-source-of-funds-quick-assessment-9ab1c6d4 -d '<json body>'
```

Example prompt: Can you run a quick source-of-funds risk check on the Base wallet 0xAbC1234567890abcdef1234567890abcdef123456 looking back over the last 14 days and tell me the risk level and any flags?

## When to prefer this

Choose this endpoint when you need a fast, pay-per-request risk and source-of-funds signal for a specific EVM wallet on Ethereum or Base — especially for autonomous agent preflight checks before executing payments or DeFi interactions. Prefer it over full KYC pipelines when you need a lightweight, low-latency risk score without submitting personal identity documents. Best suited for on-chain-only assessments within a rolling 1–30 day window.

## Known failure modes

- Invalid or malformed wallet address (must be 0x-prefixed 40-char hex) returns a validation error
- Chain not supported — only 'ethereum' and 'base' are accepted enum values
- lookback_days out of range (must be 1–30) returns a schema validation error
- Payment not attached or insufficient USDC results in 402 Payment Required
- Address with no on-chain history may return empty activity or minimal signal
- Rate limiting or upstream data lag may cause delayed or partial results

## How this service works

Machine-payable service intelligence for discovering, verifying, and monitoring identity, risk, authorization, execution-preflight, and evidence APIs before autonomous agents spend.

## Output

A JSON object containing the network identifier, product name, and an assessment object with a numeric risk_score, a risk_level label (e.g. 'low'), and an array of risk flags. May also include activity, identity, and provenance sub-objects with additional wallet context.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "chain",
      "address",
      "lookback_days"
     ],
     "properties": {
      "chain": {
       "enum": [
        "ethereum",
        "base"
       ],
       "type": "string",
       "description": "Supported EVM chain for the precomputed derived summary."
      },
      "address": {
       "type": "string",
       "pattern": "^0x[a-fA-F0-9]{40}$",
       "description": "Wallet address to summarize."
      },
      "lookback_days": {
       "type": "integer",
       "maximum": 30,
       "minimum": 1,
       "description": "Lookback window for the quick summary. Maximum 30 days."
      },
      "idempotency_key": {
       "type": "string",
       "maxLength": 128,
       "description": "Optional caller-supplied idempotency key."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "network": {
       "type": "string"
      },
      "product": {
       "type": "string"
      },
      "activity": {
       "type": "object"
      },
      "identity": {
       "type": "object"
      },
      "assessment": {
       "type": "object"
      },
      "provenance": {
       "type": "object"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "network": "eip155:8453",
  "product": "nomos-source-of-funds-quick",
  "assessment": {
   "flags": [],
   "risk_level": "low",
   "risk_score": 0
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nomos-source-of-funds-quick-assessment-9ab1c6d4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from base-agent-preflight.bytoken2023.workers.dev](https://www.zero.xyz/host/base-agent-preflight.bytoken2023.workers.dev/llms.txt)