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

# DialNexa Updates for September, 2026

> DialNexa changelog for September 2026: platform updates, documentation changes, improvements, fixes, and migration notes.

The DialNexa changelog for September 2026 records platform updates, documentation changes, improvements, fixes, and breaking changes that affect DialNexa users. Each entry lists the date, update title, what changed, and any docs links you should review.

> ## Documentation Index
>
> Fetch the complete documentation index at: [https://dialnexa.com/docs/llms.txt](https://dialnexa.com/docs/llms.txt)
>
> AI agents and IDE assistants can connect to the docs MCP server at: [https://dialnexa.com/docs/mcp](https://dialnexa.com/docs/mcp)
>
> Use this file to discover all available pages before exploring further.

## September 2026 update summary

| Date                | Update                                                                                                                               | What to review                                                                                          |
| ------------------- | ------------------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------- |
| 7th September, 2026 | [Agent Builder build path and agent type recommendation](/docs/agents/ai-agent-builder#dialnexa-agent-builder-workflow)                   | The build path dialog, the three intake sections, and overriding the suggested agent type.              |
| 7th September, 2026 | [Agent type selection moved to Manual Build](/docs/agents/types-of-agents#choose-an-agent-type-in-the-dashboard)                          | Where each agent type now lives and how to reveal the IVR card.                                         |
| 7th September, 2026 | [Prompt size limits and the editor meter](/docs/agents/prompts-and-welcome-messages#prompt-size-limits)                                   | Meter states, the enforced ceiling per model, and what fallback selection changes.                      |
| 7th September, 2026 | [IVR handoff variables and branch labels](/docs/agents/ivr-agents#handoff-variables-and-publishing-warnings)                              | Fallback variables on Connect To Agent nodes, branch digit labels, and recording scope after a handoff. |
| 7th September, 2026 | [Agent exports and imports drop phone bindings](/docs/import-agents#import-agents-without-phone-bindings)                                 | What an export now omits and what to assign after publishing in the destination workspace.              |
| 7th September, 2026 | [Workflow lead tags](/docs/workflows/lead-variables-and-call-attributes#tag-workflow-leads-on-upload)                                     | Tag limits, the reserved tags column, and finding the resulting calls in Call History.                  |
| 7th September, 2026 | [End Call is platform-managed](/docs/agent-settings/functions#platform-managed-end-call)                                                  | Why End Call cannot be edited and which rules only apply to callable functions.                         |
| 7th September, 2026 | [Recipient column mapping and duplicate rules](/docs/batch-calls/recipient-files#avoid-column-mapping-collisions)                         | Mapping collisions, which column wins, and Excel phone cell handling.                                   |
| 7th September, 2026 | [Batch retry count corrected to four](/docs/batch-calls/drafts-scheduling-and-starting#dialnexa-batch-draft-schedule-and-launch-controls) | The accepted retry range and interval bounds.                                                           |
| 7th September, 2026 | [Knowledge base document API](/docs/api-reference/v1/knowledge-base/upload-document)                                                      | Upload and list requests, and the 404 returned for a knowledge base you do not own.                     |
| 7th September, 2026 | [Public API reference expanded to 72 operations](/docs/api-reference/introduction#dialnexa-api-base-url)                                  | The newly documented operations and their request and response contracts.                               |
| 7th September, 2026 | [Batch reads for API key callers](/docs/api-reference/v1/batches/get#when-to-use-this)                                                    | Why the detail and status responses are empty and which endpoints to use instead.                       |
| 7th September, 2026 | [Batch retry and filter parameters in the reference](/docs/api-reference/v1/batches/create#create-batch-calls-with-retry-settings)        | Retry fields on Create Batch Call and the IVR and tag filters on Get Batch Call Details.                |
| 7th September, 2026 | [Phone number purchase accepts provider formatting](/docs/api-reference/v1/phone-numbers/buy)                                             | Which phone number formats the purchase endpoint accepts.                                               |
| 7th September, 2026 | [MCP reference regenerated with full schemas](/docs/mcp-tools/overview#dialnexa-mcp-tool-reference)                                       | The 102 tool catalog, upload tools, and per-tool input and output schemas.                              |

## DialNexa changelog for September 2026

## 7th September, 2026

### [Agent Builder build path and agent type recommendation](/docs/agents/ai-agent-builder#dialnexa-agent-builder-workflow)

Create agent now opens a build path choice. Proceed to Agent Builder collects Goal & Context, Call Playbook, and Personality, then suggests an agent type you can override. Manual Build starts from a template or a blank configuration. Agent Builder can draft Single Prompt, Conversational Flow, Speech to Speech, and IVR agents.

### [Agent type selection moved to Manual Build](/docs/agents/types-of-agents#choose-an-agent-type-in-the-dashboard)

The Dynamic Agents and Static Agents tabs have been replaced. Manual Build shows Single Prompt, Conversational Flow, and Speech to Speech cards, and Show the IVR agent reveals the IVR Agent card, still marked Beta.

### [Prompt size limits and the editor meter](/docs/agents/prompts-and-welcome-messages#prompt-size-limits)

Single Prompt and Speech to Speech editors show an estimated token count with green, yellow, and red states. Every selectable model now has an enforced ceiling, and with a fallback enabled the tighter of the two applies. Save and publish are blocked above the ceiling.

### [IVR handoff variables and branch labels](/docs/agents/ivr-agents#handoff-variables-and-publishing-warnings)

Each Connect To Agent node needs a non-empty fallback for every variable in its target's published prompt, welcome message, voicemail message, and default map. Branches show their digit on the connecting line, and publishing warns about missing fallbacks. IVR calls record only the conversational portion after a handoff.

### [Agent exports and imports drop phone bindings](/docs/import-agents#import-agents-without-phone-bindings)

Exports strip inbound and outbound phone bindings, including nested phone-provider objects, and import ignores bindings in older JSON files. IVR menu graphs are preserved. Assign phone numbers explicitly in the destination workspace after publishing.

### [Workflow lead tags](/docs/workflows/lead-variables-and-call-attributes#tag-workflow-leads-on-upload)

Tag a lead cohort from the upload dialog or a reserved tags column. Tags are combined, lowercased, trimmed, and deduplicated, with at most 20 tags per lead and 40 characters per tag. Calls placed by the workflow copy the lead's tags into the call record for Call History filtering.

### [End Call is platform-managed](/docs/agent-settings/functions#platform-managed-end-call)

End Call appears automatically on new agents and cannot be edited or deleted. It does not on its own disable predictive preprocessing or require a tool-calling model. Those rules apply once you add callable functions.

### [Recipient column mapping and duplicate rules](/docs/batch-calls/recipient-files#avoid-column-mapping-collisions)

Two mapped columns cannot resolve to the same field name, and a mapped column wins over an unmapped source column of the same name. Duplicate removal uses the phone column you selected, and numeric Excel phone cells are converted to strings before validation.

### [Batch retry count corrected to four](/docs/batch-calls/drafts-scheduling-and-starting#dialnexa-batch-draft-schedule-and-launch-controls)

The retry count range is 0 through 4, so a recipient is called at most five times. The retry interval is in minutes, from 0 to 1440. The previous guidance said 5, which the API has never accepted.

### [Knowledge base document API](/docs/api-reference/v1/knowledge-base/upload-document)

Upload a PDF or TXT document to a knowledge base with an API key, and list a knowledge base's documents. A knowledge base outside your workspace returns 404 rather than confirming the ID exists, because document listings carry each file's full text.

### [Public API reference expanded to 72 operations](/docs/api-reference/introduction#dialnexa-api-base-url)

Added API key validation, IVR transfer helper reads, agent version and function reads, agent type recommendation, and knowledge base documents. Every operation was checked against DialNexa's own API definition, so the reference covers exactly the endpoints the platform publishes, with request fields, response envelopes, and errors. Endpoints the platform treats as internal are deliberately absent.

### [Batch reads for API key callers](/docs/api-reference/v1/batches/get#when-to-use-this)

Get Batch Call Details and Update Batch Call Status return an empty object to API key callers because batch detail fields are filtered from the response. Use List Batch Calls for status and List Calls with batch\_call\_id for call records, or set export=true on the detail endpoint.

### [Batch retry and filter parameters in the reference](/docs/api-reference/v1/batches/create#create-batch-calls-with-retry-settings)

Create Batch Call now lists `number_of_retries` and `interval_between_retries` as request fields with their accepted ranges, and Get Batch Call Details lists the `is_ivr`, `tags` and `tags_match` filters. The endpoints already accepted all five; only the reference was missing them. List Organization Folders gained `export` and Search Available Numbers gained `region` for the same reason.

### [Phone number purchase accepts provider formatting](/docs/api-reference/v1/phone-numbers/buy)

Buy Phone Number accepts the country code and subscriber number with or without a leading plus sign, because providers differ on how they list a number. Pass it back exactly as Search Available Numbers returned it. Anything other than digits and an optional leading plus is still rejected.

### [MCP reference regenerated with full schemas](/docs/mcp-tools/overview#dialnexa-mcp-tool-reference)

The reference now covers all 102 registered tools, including the file upload tools, with the complete input schema each client receives and the registered output schema for 101 of them. One tool has no registered output schema and its page says so.