Part 2C — Calls, call-outs, OTP, reports

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All endpoints: 🔒 Protected · Bearer API key. A call or call-out of another client app gives 404.

G. Calls and their reports

Every call (in or out) is one record with a summary, a timeline of what happened, and — when something was recorded — audio and a transcript. The same summary arrives in the call.ended webhook (Part 3).

G1. List calls

Endpoint: GET {base_url}/calls

Query	Type	Required	Description	Default
`accountId`	uuid	No	One account (without it: all the client app's calls)
`from` / `to`	ISO instant	No	Started between (`2026-11-13T00:00:00Z`)
`type`	string	No	`INCOMING` · `BROADCAST` · `CAMPAIGN` · `OTP` · `AGENT_CALL` · `TEST`
`result`	string	No	e.g. `MISSED`, `VOICEMAIL` (Part 4)
`status`	string	No	e.g. `LIVE` for calls in progress
`number`	string	No	Calls from or to this E.164 number
`calloutId`	uuid	No	Calls placed by one call-out
`page` / `size`	integer	No	Page (from 0) and page size	0 / 50

Success Response JSON Sample (one call shown; each item is a G2 summary):

{
  "success": true,
  "httpStatus": "200 OK",
  "message": "Calls",
  "action": null,
  "action_time": "2026-11-13T20:05:32.490000000",
  "data": {
    "calls": [ { "callId": "355760f8-51c0-47c8-b3b0-49c3612e4b96", "type": "INCOMING", "result": "VOICEMAIL", "…": "…" } ],
    "page": 0,
    "size": 50,
    "total": 65
  }
}

Newest first. A wrong value for a filter → 400 Invalid value for parameter: <name>.

G2. Get a call

Endpoint: GET {base_url}/calls/{callId}

Success Response JSON Sample (a caller left a voicemail while waiting for an agent):

{
  "success": true,
  "httpStatus": "200 OK",
  "message": "Call",
  "action": null,
  "action_time": "2026-11-13T20:05:32.497509178",
  "data": {
    "callId": "355760f8-51c0-47c8-b3b0-49c3612e4b96",
    "accountRef": "softphone",
    "accountId": "adb72fac-66a2-471b-a437-035fe008197d",
    "type": "INCOMING",
    "direction": "INBOUND",
    "from": "+255745051250",
    "to": "+255677000001",
    "status": "ENDED",
    "result": "VOICEMAIL",
    "endReason": "SCRIPT_END",
    "endedBy": "SYSTEM",
    "handledBy": "VOICEMAIL",
    "startedAt": "2026-11-13T16:45:27.909648Z",
    "answeredAt": "2026-11-13T16:45:27.909648Z",
    "endedAt": "2026-11-13T16:46:20.533012Z",
    "durations": { "ringSeconds": null, "totalSeconds": 53, "scriptSeconds": 16, "waitSeconds": 35,
                   "talkSeconds": 0, "holdSeconds": 0, "aiSeconds": 0 },
    "keys": null,
    "lastBlock": "vm",
    "outcomes": [],
    "usage": { "pstnSeconds": 53, "trunkSeconds": 53, "waitSeconds": 35, "aiSeconds": 0, "ttsChars": 0, "sttSeconds": 0 },
    "providerCost": {
      "tzs": 25.61,
      "usd": 0.000893,
      "items": [
        { "provider": "AT", "tzs": 25.61, "usd": 0.0, "lines": [
          { "item": "AT_INBOUND", "qty": 1, "unit": "MINUTE", "rate": 17, "currency": "TZS", "amount": 17, "source": "RATE", "model": null },
          { "item": "AT_SIP_TRUNK", "qty": 1, "unit": "MINUTE", "rate": 8.61, "currency": "TZS", "amount": 8.61, "source": "RATE", "model": null } ] },
        { "provider": "OPENAI", "tzs": 0.0, "usd": 0.000893, "lines": [
          { "item": "OPENAI_CHAT_IN", "qty": 474, "unit": "TOKEN", "rate": 1e-07, "currency": "USD", "amount": 4.74e-05, "source": "OPENAI", "model": "gpt-6-luna" },
          { "item": "OPENAI_CHAT_OUT", "qty": 42, "unit": "TOKEN", "rate": 5e-07, "currency": "USD", "amount": 2.1e-05, "source": "OPENAI", "model": "gpt-6-luna" },
          { "item": "OPENAI_TRANSCRIBE", "qty": 0.1833, "unit": "MINUTE", "rate": 0.0045, "currency": "USD", "amount": 0.00082485, "source": "MEASURED", "model": "gpt-transcribe" } ] }
      ]
    },
    "recorded": true,
    "script": { "versionId": "e183c7f1-3137-4848-95c1-11a7e8bef17a", "version": 1, "ref": "desk-test" },
    "calloutId": null,
    "hangupCause": null,
    "sipStatus": null,
    "meta": null
  }
}

Field	Description
`type` / `direction`	What kind of call (Part 4); `INBOUND` = someone called us
`from` / `to`	E.164 numbers. Incoming: caller → our number. Outgoing: our number → person
`status`	Live state; `ENDED` once over
`result`	How it went, set when it ends: `HANDLED_BY_SCRIPT` · `HANDLED_BY_AGENT` · `HANDLED_BY_AI` · `VOICEMAIL` · `MISSED` · `ABANDONED` · `HUNG_UP_EARLY` · `REJECTED`; outgoing: `ANSWERED` · `NO_ANSWER` · `BUSY` · `DECLINED` · `UNREACHABLE` · `INVALID_NUMBER` · `FAILED` · `NOT_DIALED`
`endReason` / `endedBy`	Why and by whom it ended (`CALLER_HUNG_UP` / `CALLER`, `SCRIPT_END` / `SYSTEM`…)
`handledBy`	Who dealt with the caller in the end: `SCRIPT` · `AGENT` · `AI` · `VOICEMAIL`
`answeredAt`	Incoming: when the engine picked up (= start). Outgoing: when the person answered; `null` if never
`durations` (s)	`ringSeconds` (outgoing, before answer) · `totalSeconds` · `scriptSeconds` (in blocks) · `waitSeconds` (waiting room) · `talkSeconds` (with an agent) · `holdSeconds` · `aiSeconds`
`keys`	Every key the caller pressed, in order (`"1234"`)
`lastBlock`	The block the call ended in
`outcomes`	Tags the flow set on the way (`callback_scheduled`, `opted_out`, an App action's outcome…)
`usage`	Measured units: phone seconds (`pstnSeconds`, `trunkSeconds`), `ttsChars` (new text made into audio for this call), `sttSeconds` (caller speech transcribed)
`providerCost`	Cost to run it, per provider and line (Part 1 §1.11)
`recorded`	Something was recorded: `GET …/recording` works
`script`	The flow version it ran
`calloutId`	Set when a call-out placed it
`hangupCause` / `sipStatus`	Outgoing calls that failed: short network reason (`603 Decline`, `486 Busy here`) and SIP code
`meta`	What the client app attached (call-out `meta`, OTP `meta`, scheduled callbacks' `{said, scheduledBy}`)

G3. Timeline of a call

Purpose: Everything that happened, step by step: blocks entered, sentences said, keys, speech heard, rings, transfers, recordings. For a call detail screen and for support.

Endpoint: GET {base_url}/calls/{callId}/timeline

Success Response JSON Sample (first events):

{
  "success": true,
  "httpStatus": "200 OK",
  "message": "Timeline",
  "action": null,
  "action_time": "2026-11-13T20:05:32.529813711",
  "data": [
    { "seq": 1, "type": "CALL_RECEIVED", "block": null, "at": "2026-11-13T16:45:27.912895Z", "offsetMs": 3,
      "data": { "to": "+255677000001", "from": "+255745051250" } },
    { "seq": 2, "type": "SAY", "block": null, "at": "2026-11-13T16:45:27.915036Z", "offsetMs": 5,
      "data": { "text": "Habari, unazungumza na huduma ya kidijitali ya Ringmaster Lab.", "voice": "marin" } },
    { "seq": 4, "type": "BLOCK_ENTER", "block": "hi", "at": "2026-11-13T16:45:27.915108Z", "offsetMs": 5,
      "data": { "type": "say" } },
    { "seq": 9, "type": "QUEUED", "block": "desk", "at": "2026-11-13T16:45:40.577Z", "offsetMs": 12668,
      "data": { "department": "Mapokezi" } },
    { "seq": 12, "type": "WAIT_OPTION", "block": "desk", "at": "2026-11-13T16:46:03.869Z", "offsetMs": 35960,
      "data": { "key": "9", "exit": "vm" } },
    { "seq": 16, "type": "VOICEMAIL", "block": "vm", "at": "2026-11-13T16:46:17.441Z", "offsetMs": 49532,
      "data": { "recorded": true } }
  ]
}

Field	Description
`seq`	Order (gaps are possible)
`type`	What happened (Part 4 — timeline events)
`block`	The block it happened in, if any
`offsetMs`	Milliseconds since the call started
`data`	Details for that type (texts said, keys, speech, department, exit taken…)

A SAY event is written when the sentence is queued to play; the audio itself follows in order.

G4. Recording of a call

Purpose: The MP3 of the call's latest recording (a voicemail, or the recorded part with an agent).

Endpoint: GET {base_url}/calls/{callId}/recording

Success Response: 200, Content-Type: audio/mpeg, the audio bytes (not JSON). Stream it to the client app's users through its own backend (the API key must not reach a browser).

Errors (JSON): 404 "No recording for this call" — nothing recorded, or not ready yet (wait for recording.ready); 404 "Recording file missing" — deleted after retentionDays.

G5. Transcript and summary

Endpoint: GET {base_url}/calls/{callId}/transcript

Success Response JSON Sample:

{
  "success": true,
  "httpStatus": "200 OK",
  "message": "Transcript",
  "action": null,
  "action_time": "2026-11-13T20:05:32.551771069",
  "data": {
    "callId": "355760f8-51c0-47c8-b3b0-49c3612e4b96",
    "status": "READY",
    "language": "sw",
    "text": "Huu ndio ujumbe wangu, na shukrani sana.\n",
    "summary": "Mpigaji amesema huo ndio ujumbe wake na ametoa shukrani nyingi.",
    "sentiment": "positive",
    "unanswered": [],
    "fields": {},
    "model": "gpt-6-luna",
    "updatedAt": "2026-11-13T16:46:27.176884Z"
  }
}

Field	Description
`status`	`READY` · `FAILED` (transcription failed; `text` is empty)
`language`	Detected language (`sw`, `en`)
`text`	What was said
`summary`	One or two sentences, in the call's language
`sentiment`	`positive` · `neutral` · `negative`
`unanswered`	Questions the caller asked that the AI could not answer (for the knowledge base)
`fields`	Values the flow asked the summary to pick out (e.g. `{"amount": "45000"}`), with fixed English keys

Ready when the summary.ready webhook arrives. Before that, and when nothing was recorded or recording.transcribe is off: 404 "No transcript for this call".

G6. Export calls (CSV)

Endpoint: GET {base_url}/calls/export.csv

Query	Type	Required	Description	Default
`accountId`	uuid	Yes	The account
`from` / `to`	date	No	Days `YYYY-MM-DD`, account time; at most 400 days	the last 7 days

Success Response: 200, text/csv attachment, up to 100,000 rows, oldest first. Header row:

callId,type,direction,fromE164,toE164,status,result,endReason,endedBy,handledBy,startedAt,answeredAt,endedAt,totalSeconds,waitSeconds,talkSeconds,aiSeconds,pstnSeconds,trunkSeconds,ttsChars,sttSeconds,hangupCause,sipStatus,keys,lastBlock,calloutId,agentRef,outcomes,meta

G7. Agent calls a number (click to call)

Purpose: An agent calls a customer from the browser, from one of the account's numbers. The engine dials; the agent joins the call room with the token returned and hears it ring.

Endpoint: POST {base_url}/calls/agent

Request JSON Sample:

{
  "accountId": "adb72fac-66a2-471b-a437-035fe008197d",
  "numberId": "8a8d9c13-bda2-4a18-8410-c5ec49ed2c66",
  "to": "+255745051250",
  "agentRef": "asha",
  "meta": { "ticket": "T-1042" }
}

Parameter	Type	Required	Description
`accountId`	uuid	Yes	The account
`numberId`	uuid	Yes	Calling from (one of the account's numbers)
`to`	string	Yes	Tanzanian number
`agentRef`	string	Yes	The agent who calls
`meta`	object	No	Kept on the call, returned in its summary and webhooks

Success Response JSON Sample (201 Created):

{
  "success": true,
  "httpStatus": "201 CREATED",
  "message": "Calling",
  "action": null,
  "action_time": "2026-11-13T20:10:00.000000000",
  "data": {
    "callId": "6a1f…",
    "room": { "url": "wss://<livekit-host>", "room": "call-6a1f…", "identity": "agent-0ea57aeb-…", "token": "eyJhbGciOi…" }
  }
}

The browser joins room with token (LiveKit JS SDK, microphone on). The agent is BUSY until the call ends.

Errors: 404 "Agent not found: asha" · 409 AGENT_BUSY · 403 CAN_CALL_REFUSED (the client app's can-call check said no, Part 3) · 400 "Only Tanzanian numbers can be called".

H. Call-outs (calling people)

Rules applied to every call-out (quiet hours, opt-outs, retries, pace): Part 1 §1.5. Call-outs play an Outgoing flow; its vars must be given for every person.

Quick call:  POST /v1/calls ─────────────────────────────── (created + people added + started in one go)
Step by step: POST /v1/callouts → POST …/{id}/recipients (one or more times) → POST …/{id}/start
              DRAFT ─start─► SCHEDULED (startsAt later) ─► RUNNING ⇄ PAUSED ─► COMPLETED
                │                  │                          │
                └──cancel──► CANCELLED ◄──cancel──┘           └──stop──► STOPPED

H1. Quick call

Purpose: Call 1–1000 people now with one request ("Habari Asha, oda yako iko tayari").

Endpoint: POST {base_url}/calls

Request JSON Sample:

{
  "accountId": "51f815ba-e9eb-4e29-9297-3c56033d32cd",
  "scriptVersionId": "9f0d2a77-…",
  "fromNumberId": "2c4e…",
  "name": "Order ready",
  "to": [
    { "e164": "+255745051250", "vars": { "product": "Acetic Acid", "qty": "20" }, "meta": { "orderId": "ORD-88" } },
    { "e164": "+255712345678", "vars": { "product": "Zinc Dust", "qty": "5" } }
  ],
  "maxTries": 3,
  "retryGapSec": 300,
  "meta": { "batch": "evening" }
}

Parameter	Type	Required	Description	Validation
`accountId`	uuid	Yes	The account
`scriptVersionId`	uuid	Yes	A version of an Outgoing flow of the account	not revoked
`fromNumberId`	uuid	Yes	Caller ID: one of the account's numbers
`to`	array	Yes	People: `{e164, vars?, meta?}`	1–1000
`to[].vars`	object	When the flow has `vars`	Values the flow says (`{product}`)	every flow var, not blank
`to[].meta`	object	No	Kept on the person and their calls
`name`	string	No	Shown in lists	default "API broadcast"
`maxTries`	integer	No	Tries per person (busy / no answer / unreachable / failed)	1–3, default 1
`retryGapSec`	integer	No	Wait between tries	300–86400, default 300
`meta`	object	No	Kept on the call-out

Success Response: 201 Created, message "Calling", data = the call-out (H7), already RUNNING (or SCHEDULED in quiet hours: it waits).

Errors:

403 FEATURE_OFF "Call-outs are not enabled for this client app" (no CALLOUTS feature)
400 "Call-outs run Outgoing scripts only" · "Script version belongs to another account"
409 VERSION_REVOKED
422 VALIDATION_FAILED "Some people have no value for a script variable", data: [{"e164": "+2557…", "missing": "product"}]
422 VALIDATION_FAILED "Nobody can be called", data = the skipped list (H3)

H2. Create a call-out

Purpose: A broadcast built in steps, or a campaign (a list called over days, in a window, at a pace).

Endpoint: POST {base_url}/callouts

Request JSON Sample (campaign):

{
  "accountId": "51f815ba-e9eb-4e29-9297-3c56033d32cd",
  "externalRef": "debt-reminder-2026-11",
  "name": "Debt reminder November",
  "kind": "CAMPAIGN",
  "scriptVersionId": "9f0d2a77-…",
  "fromNumberId": "2c4e…",
  "startsAt": "2026-11-14T06:00:00Z",
  "endsAt": "2026-11-21T15:00:00Z",
  "windowFrom": "09:00",
  "windowTo": "17:00",
  "days": [1, 2, 3, 4, 5],
  "maxTries": 3,
  "retryGapSec": 3600,
  "pacePerMin": 30,
  "fallback": { "action": "send_sms", "params": { "text": "Habari {name}, tafadhali lipa deni lako la {amount}." } },
  "meta": { "segment": "overdue-30" }
}

Parameter	Type	Required	Description	Validation / default
`accountId`	uuid	Yes
`name`	string	Yes		not blank
`kind`	string	Yes	`BROADCAST` · `CAMPAIGN`
`scriptVersionId`	uuid	Yes	Outgoing flow version. May still wait for approval: the call-out shows `waitingApproval: true` and starts once approved	not revoked
`fromNumberId`	uuid	Yes	Caller ID	the account's number
`externalRef`	string	No	The client app's id
`startsAt`	instant	No	Don't call before (`start` makes it `SCHEDULED`)	default: at start
`endsAt`	instant	No	Campaign: stop for good after this (`STOPPED`)
`windowFrom` / `windowTo`	`HH:mm`	No	Campaign: only call between these each day (account time)	both or neither
`days`	int[]	No	Campaign: week days, 1 = Monday … 7 = Sunday
`quietOverride`	boolean	No	Call even in quiet hours (urgent notices only)	default `false`
`maxTries`	integer	No	Tries per person	1–5, default 1
`retryGapSec`	integer	No	Wait between tries	≥ 300, default 3600
`pacePerMin`	integer	No	New calls per minute	1–600, default 60
`fallback`	object	No	Campaign: after a person's last failed try, ask the client app to run one of its registered actions (`{action, params}`); not one that waits
`meta`	object	No

Success Response: 201 Created, message "Call-out created", data = the call-out, status: "DRAFT".

Errors: 400 "Give both windowFrom and windowTo" · "Window times must be HH:mm" · "Days are 1 (Monday) to 7 (Sunday)" · "fallback.action must be one of the client app's registered actions" · "A fallback action can't be one that waits for an outcome" · 403 FEATURE_OFF · the same flow errors as H1.

H3. Add people

Purpose: Add people to a DRAFT call-out (call it several times for long lists).

Endpoint: POST {base_url}/callouts/{id}/recipients

Request JSON Sample:

{
  "recipients": [
    { "e164": "+255745051250", "vars": { "name": "Asha", "amount": "45000" }, "meta": { "customerId": "C-77" } },
    { "e164": "0712345678", "vars": { "name": "Juma", "amount": "12000" } },
    { "e164": "+14155550100", "vars": { "name": "Tom", "amount": "1" } }
  ]
}

Parameter	Type	Required	Description	Validation
`recipients`	array	Yes	`{e164, vars?, meta?}`	≤ 10,000 per request; every flow var given

Success Response JSON Sample:

{
  "success": true,
  "httpStatus": "200 OK",
  "message": "Recipients added",
  "action": null,
  "action_time": "2026-11-13T20:12:00.000000000",
  "data": {
    "added": 2,
    "skipped": [ { "e164": "+14155550100", "reason": "NOT_TANZANIAN" } ]
  }
}

`skipped[].reason`	Means
`INVALID_NUMBER`	Not a phone number
`NOT_TANZANIAN`	Only `+255` numbers are called
`DUPLICATE`	Already on this call-out (or twice in the request)
`OPTED_OUT`	On the account's opt-out list: kept as `SKIPPED` with result `OPTED_OUT`, never called

Local numbers (0712…) are turned into E.164.

Errors: 409 LIST_LOCKED "The list is locked once a call-out starts; create a new call-out" · 422 VALIDATION_FAILED "Some people have no value for a script variable" (nobody added).

H4. Start, pause, resume, stop, cancel

Endpoint: POST {base_url}/callouts/{id}/{action}

`{action}`	From → to	Refused with
`start`	`DRAFT` → `RUNNING` (or `SCHEDULED` when `startsAt` is later). Locks the list	`409 ALREADY_STARTED` · `409 NO_RECIPIENTS` "Nobody to call"
`pause`	`RUNNING` / `SCHEDULED` → `PAUSED`; calls in progress finish. Optional body `{"reason": "…"}` (default `PAUSED_BY_CLIENT`)	`409 NOT_RUNNING`
`resume`	`PAUSED` → `RUNNING`	`409 NOT_PAUSED`
`stop`	any unfinished → `STOPPED`; people not yet called are not called. Stopping a finished call-out changes nothing	—
`cancel`	`DRAFT` / `SCHEDULED` → `CANCELLED` (nothing was dialled)	`409 ALREADY_RUNNING` "A running call-out is stopped, not cancelled"

Success Response: 200, message "Call-out start" (… "pause", "resume", "stop", "cancel"), data = the call-out. Unknown action → 400 "Unknown action: explode".

The engine itself also pauses call-outs, with a pauseReason: ACCOUNT_SUSPENDED, VERSION_REVOKED, FEATURE_OFF (the owner took CALLOUTS away), … and sends callout.paused (Part 3). It never resumes them by itself.

H5. List call-outs

Endpoint: GET {base_url}/callouts?accountId={accountId}

Query	Type	Required	Description
`accountId`	uuid	Yes	Missing → `400 Missing parameter: accountId`

Success Response: data = array of call-outs, newest first. Scheduled callbacks booked by callers are here too, with externalRef schedule:<flow ref>:<number>.

H6. Get a call-out's people

Endpoint: GET {base_url}/callouts/{id}/recipients

Query	Type	Required	Description	Default
`status`	string	No	`PENDING` · `DIALING` · `DONE` · `SKIPPED`	all
`page` / `size`	integer	No	Page from 0; size up to 500	0 / 100

Success Response JSON Sample:

{
  "success": true,
  "httpStatus": "200 OK",
  "message": "Recipients",
  "action": null,
  "action_time": "2026-11-13T20:05:37.426862727",
  "data": [
    {
      "id": 11,
      "e164": "+255745051250",
      "status": "DONE",
      "result": "ANSWERED",
      "attempts": 1,
      "lastCallId": "fff4aa3f-8ed5-44e6-947c-c82bb3628c41",
      "answeredSeconds": 28,
      "keys": "1234",
      "outcomes": null,
      "meta": { "said": "After five minutes, baada ya dakika tano.", "scheduledBy": "ca10b2f7-a5a3-41bb-be8b-2e486b2b5dbf" },
      "nextAttemptAt": null
    }
  ]
}

Field	Description
`status`	`PENDING` (waiting or between tries) · `DIALING` · `DONE` · `SKIPPED`
`result`	The last try's result (`ANSWERED`, `NO_ANSWER`, `BUSY`, `DECLINED`, `OPTED_OUT`…)
`attempts` / `nextAttemptAt`	Tries so far; when the next try is due (while `PENDING`)
`lastCallId`	The last call to this person (G2)
`answeredSeconds` / `keys` / `outcomes`	From the answered call

H7. Get a call-out

Endpoint: GET {base_url}/callouts/{id}

Success Response JSON Sample (a callback a caller booked for "baada ya dakika tano"):

{
  "success": true,
  "httpStatus": "200 OK",
  "message": "Call-out",
  "action": null,
  "action_time": "2026-11-13T20:05:37.397238463",
  "data": {
    "id": "510fca7b-b226-46ad-b80a-0082ab4ab0d5",
    "externalRef": "schedule:account-callback:+255745051250",
    "name": "Callback +255745051250",
    "kind": "BROADCAST",
    "status": "COMPLETED",
    "pauseReason": null,
    "waitingApproval": false,
    "scriptVersionId": "3bcb496b-e302-4a98-9e8e-fd3e4c80b768",
    "startsAt": "2026-11-13T14:41:00Z",
    "endsAt": null,
    "windowFrom": null,
    "windowTo": null,
    "days": null,
    "maxTries": 2,
    "retryGapSec": 300,
    "pacePerMin": 60,
    "total": 1,
    "byStatus": { "DONE": 1 },
    "byResult": { "ANSWERED": 1 },
    "byOutcome": {},
    "createdAt": "2026-11-13T14:36:38.242481Z",
    "startedAt": "2026-11-13T14:36:38.282846Z",
    "completedAt": "2026-11-13T14:41:34.766757Z"
  }
}

Field	Description
`status` / `pauseReason`	See the diagram above
`waitingApproval`	The flow version is not runnable yet; nobody is called until it is approved
`days`	Campaign days as text (`"1,2,3,4,5"`)
`total` / `byStatus` / `byResult` / `byOutcome`	Counts over its people

H8. Call-out stats

Endpoint: GET {base_url}/callouts/{id}/stats

Success Response JSON Sample:

{
  "success": true,
  "httpStatus": "200 OK",
  "message": "Call-out stats",
  "action": null,
  "action_time": "2026-11-13T20:05:37.463714267",
  "data": {
    "calloutId": "510fca7b-b226-46ad-b80a-0082ab4ab0d5",
    "total": 1,
    "byStatus": { "DONE": 1 },
    "byResult": { "ANSWERED": 1 },
    "byOutcome": {},
    "byAttempts": { "1": 1 },
    "byHour": [
      { "key": "2026-11-13T17:00", "values": { "dialed": 1, "answered": 1, "noAnswer": 0, "busy": 0, "failed": 0, "seconds": 28 } }
    ]
  }
}

Field	Description
`byAttempts`	People by the try that finished them (`{"1": 80, "2": 15, "3": 5}`)
`byHour[].key`	Hour in the account's time zone
`byHour[].values`	Calls dialled, answered, not answered, busy, failed; answered seconds

H9. Export a call-out (CSV)

Endpoint: GET {base_url}/callouts/{id}/export.csv

Success Response: text/csv attachment, one row per person:

e164,status,result,attempts,answeredSeconds,keys,outcomes,callId,meta,updatedAt
+255745051250,DONE,ANSWERED,1,28,1234,,fff4aa3f-8ed5-44e6-947c-c82bb3628c41,"{""said"": ""After five minutes, baada ya dakika tano."", ""scheduledBy"": ""ca10b2f7-…""}",2026-11-13T14:41:34.763432Z

M. OTP (a code by voice)

M1. Call a code to a number

Purpose: Read a one-time code to a person ("Namba yako ya siri ni moja, mbili, tatu, nne"), e.g. when SMS fails. Not subject to quiet hours. The code is kept encrypted and never shown in timelines or logs.

Endpoint: POST {base_url}/otp

Access Level: 🔒 Protected · Bearer API key · feature OTP

Request JSON Sample:

{
  "accountId": "adb72fac-66a2-471b-a437-035fe008197d",
  "to": "+255745051250",
  "code": "482913",
  "lang": "sw",
  "numberId": "8a8d9c13-bda2-4a18-8410-c5ec49ed2c66",
  "meta": { "purpose": "login" }
}

Parameter	Type	Required	Description	Validation
`accountId`	uuid	Yes
`to`	string	Yes	Tanzanian number
`code`	string	Yes	Digits only	4–10 digits
`lang`	string	No	`sw` · `en`	default: the account's language
`numberId`	uuid	No	Calling from	default: the account's first number
`meta`	object	No	Kept on the call

Success Response JSON Sample (201 Created):

{
  "success": true,
  "httpStatus": "201 CREATED",
  "message": "Calling",
  "action": null,
  "action_time": "2026-11-13T20:15:00.000000000",
  "data": { "callId": "a7c3…", "status": "CALLING" }
}

Follow the call with call.answered / call.ended webhooks (type OTP).

Errors:

{
  "success": false,
  "httpStatus": "422 UNPROCESSABLE_CONTENT",
  "message": "Validation failed",
  "code": "VALIDATION_FAILED",
  "action_time": "2026-11-13T20:05:41.000000000",
  "data": { "code": "must match \"\\d{4,10}\"" }
}

400 "Only Tanzanian numbers can be called" · 400 "This account has no number to call from" · 403 FEATURE_OFF · 429 RATE_LIMITED "Too many codes to this number; try again later" (otpPerDestinationPer10Min).

N. Account stats

N1. Calls per day, hour, number or type

Purpose: A business dashboard: how many calls, how they ended, how long.

Endpoint: GET {base_url}/accounts/{accountId}/stats

Query	Type	Required	Description	Default
`from` / `to`	date	No	`YYYY-MM-DD`, account time; at most 400 days	the last 7 days
`groupBy`	string	No	`day` · `hour` · `number` · `type`	`day`

Success Response JSON Sample (groupBy=day):

{
  "success": true,
  "httpStatus": "200 OK",
  "message": "Account stats",
  "action": null,
  "action_time": "2026-11-13T20:05:41.000000000",
  "data": [
    { "key": "2026-11-13", "values": { "incoming": 38, "outgoing": 2, "answered": 39, "byScript": 11, "byAgent": 3,
                                        "byAi": 9, "voicemail": 6, "missed": 0, "abandoned": 1, "hungUpEarly": 8, "seconds": 2311.0 } }
  ]
}

`values` (day / hour / number)	Description
`incoming` / `outgoing`	Calls in / out
`answered`	Answered calls
`byScript` / `byAgent` / `byAi` / `voicemail`	Who dealt with them
`missed`	Callers who waited for an agent and nobody answered
`abandoned`	Callers who hung up while waiting
`hungUpEarly`	Callers who hung up in the first seconds
`seconds`	Total call seconds

With groupBy=type, key is the call type and values = {calls, answered, seconds, pstnSeconds}:

[ { "key": "BROADCAST", "values": { "calls": 2, "answered": 1, "seconds": 28, "pstnSeconds": 28 } },
  { "key": "INCOMING",  "values": { "calls": 38, "answered": 38, "seconds": 2283, "pstnSeconds": 2283 } } ]

Errors: 400 "groupBy must be day, hour, number or type". Agents' stats: Part 2D.

Part 2A — Setup: basics, accounts, numbers

Part 2B — Call flows, media, knowledge base

Part 2C — Calls, call-outs, OTP, reports

Part 2D — Agents and live calls

Part 2E — App actions and opt-outs

Part 2C — Calls, call-outs, OTP, reports

G. Calls and their reports

G1. List calls

G2. Get a call

G3. Timeline of a call

G4. Recording of a call

G5. Transcript and summary

G6. Export calls (CSV)

G7. Agent calls a number (click to call)

H. Call-outs (calling people)

H1. Quick call

H2. Create a call-out

H3. Add people

H4. Start, pause, resume, stop, cancel

H5. List call-outs

H6. Get a call-out's people

H7. Get a call-out

H8. Call-out stats

H9. Export a call-out (CSV)

M. OTP (a code by voice)

M1. Call a code to a number

N. Account stats

N1. Calls per day, hour, number or type