> Reverse Contact API documentation. This is the Markdown copy of https://docs.reversecontact.com/sdk/javascript/filter-constants
> Every page is listed at https://docs.reversecontact.com/llms.txt, every endpoint with its credit cost and status at https://docs.reversecontact.com/catalog.json

# Filter values as constants

> Use typed industry, country, seniority and other filter constants in the Reverse Contact TypeScript SDK while accepting newly published values.

- Last verified: 2026-11-04

Use exported constants to autocomplete search filter values in your editor.

## Use filter constants

From version 0.1.6, the SDK exports constants for fixed filter lists: `Industry`, `CountryCode`, `JobFunction`, `JobSubFunction`, `Seniority`, `ContractType`, `Area` and `EmailType`. Each constant holds the filter value itself. For example, `Industry.SOFTWARE_DEVELOPMENT` is `"Software Development"`.

Your editor autocompletes the values for each filter. A constant's name is its value in capitals, with `_` for spaces and punctuation and `AND` for `&`. Examples include `Seniority.OWNER_FOUNDER`, `Area.MC_DACH` and `ContractType.FULL_TIME`.

**Filter with constants**

```typescript [TypeScript SDK]
import ReverseContact, { Area, Industry, Seniority } from "@reverse-contact/sdk";

const client = new ReverseContact({ apiKey: process.env.RC_API_KEY });

const count = await client.search.countPeople({
  currentCompanyIndustry: Industry.SOFTWARE_DEVELOPMENT,
  currentSeniority: [Seniority.CXO, Seniority.OWNER_FOUNDER],
  location: { area: Area.MC_DACH }
});
console.log("Matches:", count.data.count);
```

Filters also accept strings, so you can use newly added values without updating the SDK. The API returns HTTP `422` for an unknown value and charges 0 credits.

See [client.search](https://docs.reversecontact.com/sdk/javascript/search) for the search and count methods, [Search within a budget](https://docs.reversecontact.com/sdk/javascript/search-budget) for pagination, and the [industry reference](https://docs.reversecontact.com/reference/industries) for industry values.

Return to the [TypeScript SDK overview](https://docs.reversecontact.com/sdk/javascript).

## FAQ

### Which filter constants does the TypeScript SDK export?

The SDK exports `Industry`, `CountryCode`, `JobFunction`, `JobSubFunction`, `Seniority`, `ContractType`, `Area` and `EmailType` for fixed filter lists.

### Can I use a new filter value before updating the SDK?

Filter types also accept strings, so newly published API values work without updating the SDK. The API validates those values.

### What happens if a filter value is invalid?

The API returns HTTP 422 for an unknown filter value and charges 0 credits. Use a supported constant or a value from the relevant API reference.