# SEC CIK-Ticker Resolver (2s.io)

> SEC CIK-Ticker Resolver (2s.io) is a paid API for AI agents from 2s.io, paid per call via x402, $0.009/call, status unknown (last checked 2026-09-15).

Bidirectionally resolves SEC CIK identifiers to stock tickers (and vice versa), including listing exchange and canonical company name, sourced from SEC's company_tickers_exchange.json.

## Facts

- Endpoint: GET https://2s.io/api/finance/cik-ticker
- Price: $0.009/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sec-cik-ticker-resolver-2s-io-5621317d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__aMWbGadUVneAFcZ-hHQU

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-cik-ticker-resolver-2s-io-5621317d
```

Example prompt: What is the SEC CIK for TSLA, and does Tesla have any other share classes listed — like on Nasdaq or NYSE?

## When to prefer this

Use this endpoint when you need to bridge between a stock ticker an agent has and the SEC CIK required to query EDGAR (filings, XBRL facts, Form 4 insider trades, 13F holdings). Prefer this over finance.security-resolve when you specifically need exchange-aware CIK<->ticker mapping for US equities and do not need cross-standard identifiers like FIGI, LEI, or ISIN.

## Known failure modes

- Ticker not found in SEC universe (e.g. OTC, pink sheet, or non-US securities) — returns empty or error
- Invalid CIK format — returns error
- CIK with no associated tickers (private company or de-listed) — empty result
- Stale data window (~24h cache) may miss very recently listed or renamed tickers

## How this service works

Resolve SEC CIK <-> ticker in both directions. Pass a ticker to get its CIK; pass a CIK to get every ticker the issuer has (each share class, e.g. GOOG + GOOGL), each with its listing exchange (Nasdaq, NYSE, etc.) and the canonical company name. The CIK is the key to everything in EDGAR -- filings, XBRL facts, Form 4 insider trades, 13F holdings -- so this is the join that turns a ticker an agent has into the identifier EDGAR actually indexes by (and back). Data: SEC company_tickers_exchange.json (US public domain), cached and refreshed daily. Distinct from finance.security-resolve, which also crosses into FIGI/LEI/ISIN; this one is the focused, exchange-aware CIK<->ticker map.

## Output

Returns the SEC CIK for a given ticker (or all tickers for a given CIK), including each ticker symbol, its listing exchange (e.g. Nasdaq, NYSE), and the canonical company name as registered with the SEC. For multi-class issuers like Alphabet, all share classes (e.g. GOOG + GOOGL) are returned together.

## 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",
    "queryParams"
   ],
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "const": "GET"
    },
    "queryParams": {
     "properties": {
      "cik": {
       "type": "string",
       "description": "SEC CIK, leading zeros optional, e.g. 320193."
      },
      "ticker": {
       "type": "string",
       "description": "US stock ticker, e.g. AAPL."
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sec-cik-ticker-resolver-2s-io-5621317d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 2s.io](https://www.zero.xyz/host/2s.io/llms.txt)