# SEC 8-K Filing Velocity Spike Detector

> SEC 8-K Filing Velocity Spike Detector is a paid API for AI agents from agenttoll.dev, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).

Detects abnormal spikes in SEC 8-K filing velocity over a configurable recent time window, returning the filing rate, mean baseline, and spike flag.

## Facts

- Endpoint: POST https://agenttoll.dev/paid/osint/sec-8k-velocity
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sec-8-k-filing-velocity-spike-detector-11d312c5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JBuXDCCGWJHHwhrwYjr4p

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 sec-8-k-filing-velocity-spike-detector-11d312c5 -d '<json body>'
```

Example prompt: Check if there's been an unusual spike in SEC 8-K filings over the last 24 hours — look at up to 100 recent filings and flag anything with an anomaly score above 0.5.

## When to prefer this

Use this endpoint when you need real-time or near-real-time anomaly detection on SEC 8-K filing rates rather than retrieving specific filings by company or ticker. Prefer this over general SEC search APIs when the goal is velocity monitoring and spike detection across all filers, not document retrieval. Best suited for market surveillance agents, OSINT pipelines, or trading signal workflows that need a cheap ($0.03), pay-per-call trigger for abnormal disclosure activity.

## Known failure modes

- Invalid hours value outside 1–72 range returns validation error
- Limit outside 10–200 range returns schema validation error
- min_score outside 0–1 returns validation error
- Payment failure via x402 returns 402 Payment Required
- Empty rows array returned when no filings match the window
- Service unavailable if SEC EDGAR upstream is down

## How this service works

108+ receipt-backed x402 work products for AI agents. Clear prices, spend caps, buyer metadata, and structured results over Base USDC.

## Output

Returns a JSON object with: an array of filing rows matching the query window, a boolean spike flag indicating whether velocity is anomalous, the filings count in the last hour, the 24-hour mean filing rate, and a ratio comparing current to baseline velocity (e.g. ratio 3.8 means 3.8x normal rate).

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "POST"
     ]
    },
    "bodyType": {
     "type": "string",
     "enum": [
      "json",
      "form-data",
      "text"
     ]
    },
    "body": {
     "properties": {
      "hours": {
       "type": "integer",
       "minimum": 1,
       "maximum": 72
      },
      "min_score": {
       "type": "number",
       "minimum": 0,
       "maximum": 1
      },
      "limit": {
       "type": "integer",
       "minimum": 10,
       "maximum": 200
      }
     }
    }
   },
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   },
   "required": [
    "type"
   ]
  }
 },
 "required": [
  "input"
 ]
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "rows": [],
  "ratio": 3.8,
  "spike": true,
  "mean_24h": 3.2,
  "filings_last_1h": 12
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sec-8-k-filing-velocity-spike-detector-11d312c5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agenttoll.dev](https://www.zero.xyz/host/agenttoll.dev/llms.txt)