> ## Documentation Index
> Fetch the complete documentation index at: https://docs.seamless.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> Changes to the Seamless.AI API and its docs, newest first, plus API versions and deprecated fields.

Changes to the Seamless.AI API and these docs, newest first.

**October 22, 2026**

* New [Agent quickstart](/api-catalog/agent-quickstart): a one-page guide for AI agents.
* New [Error codes](/api-catalog/error-codes): every status, code, and poll status, with retry guidance.
* New [Choose an API](/api-catalog/choose-an-api), [Glossary](/api-catalog/glossary), [Integration recipes](/api-catalog/recipes), and [Prompts and skills](/api-catalog/prompts-and-skills).
* The [API catalog](/api-catalog/overview) now includes a plain-text index of every API for agents and screen readers.

**October 20, 2026**

* Launched the [API Catalog](/api-catalog/overview): 67 APIs, including a page for each of the 48 Contact and Company Search filters.
* Added identity APIs: [Email → Profile](/api-catalog/email-to-profile), [Phone → Profile](/api-catalog/phone-to-profile), [LinkedIn URL → Profile](/api-catalog/linkedin-to-profile), [Company Name → Website](/api-catalog/company-name-to-website), and [Website → Company Profile](/api-catalog/website-to-company-profile).
* The API v2 reference is now published under API Reference.

## API versions

| Version | Base URL | What it includes |
| - | - | - |
| v1 | `https://api.seamless.ai/api/client/v1` | Search, research, poll, location lookup, My Contact Data, My Company Data, OAuth |
| v2 | `https://api.seamless.ai/api/client/v2` | Everything in v1, plus reverse lookup by `emailAddress` or `phoneNumber`, list membership updates, lists, saved searches, campaigns, email, templates, tasks, calls, activity, credits, and feature flags |

Both versions are live, and the same API key works on both.

## Deprecated fields

These older field names are still returned so existing integrations keep working. Use the new names in new code.

| Deprecated field | Use instead | Where |
| - | - | - |
| `name` | `fullName` | Contact search results |
| `title` | `jobTitle` | Contact search and research results |
| `company` | `companyName` | Contact search and research results |
| `employeeSizeRange` | `companySize` | Contact search results |
| `companyStaffCountRange` | `companySize` | Contact research results |
| `companyRevenueRange` | `companyRevenue` | Contact research results |
| `name` | `companyName` | Company search and research results |
| `staffCountRange` | `companySize` | Company search and research results |
| `revenueRange` | `companyRevenue` | Company search and research results |

No removal date has been announced for these fields.


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