Speko

Make real phone calls

Category: AI
Primary Subcategory: AI Voice Agents & Contact Center

Integration details

Description

Speko gives ChatGPT a phone line. Describe the call you want — confirm an appointment, chase a quote, ask a clinic which insurance it takes — and Speko dials the number with a voice agent, stays on the line, and hands back a full transcript and a recording when it ends. Every call opens by saying it is an AI. Before dialing a real person you can rehearse the whole conversation against a synthetic caller and read that transcript first. Speko also transcribes audio from a link, including its own call recordings, and speaks text back in hundreds of voices and languages ChatGPT cannot produce itself.

Integration type: Plugin
Verification status: Not applicable
Platform: ChatGPT
Category: AI
Primary Subcategory: AI Voice Agents & Contact Center
Secondary Subcategories: None listed
Brand: Speko
Access: Account required
First tracked: 2026-09-02
Tool count: 18
Geography: US

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Primary Subcategory

Competing in ChatGPT AI Voice Agents & Contact Center

View Category

Listed in alphabetical order

Primary Subcategory

AiraComing soonGet notified

AivaComing soonGet notified

Autocalls AIComing soonGet notified

CALL-EComing soonGet notified

InfiniteWatchComing soonGet notified

SpekoComing soonGet notified

Tools

18 tools agents can invoke

Get one agent and its complete editable configuration.
agents.get
List agents in the current workspace without their full system prompts.
agents.list
Create a Speko agent. The agent is pinned to the failover stack matching intent.optimizeFor (quality / latency / cost) and intent.region. Stack tiers and their components for a given description are reported by preview_stacks.
agents.create
Create an outbound phone session.
sessions.phone.create
Get call detail including transcript.
calls.get
Get a signed recording URL for one call.
calls.recording.get
Get one session.
sessions.get
Get a signed recording URL for one session.
sessions.recording.get
List the STT/LLM/TTS/S2S provider and model catalog. Each entry's `id` ('vendor' or 'vendor:model') is the literal string accepted by `allowedProviders` pins in agent and session configs; `benchmarked` marks entries with live Speko benchmark scores.
models.list
List sessions for the authenticated organization.
sessions.list
List the Speko TTS voice catalog: voices (vendor, id, name) plus TTS providers with their models. Use a returned voice id as the `voice` field on agents.create or POST /v1/sessions bodies.
voices.list
List phone and SIP numbers owned by the current workspace.
phone_numbers.list
Preview the THREE voice-stack options before creating an agent — so the user picks. Returns the same recommendation the dashboard's agent-create shows, as three tiers. Present them to the user with these labels and each tier's STT / LLM / TTS: premium -> "Quality" balanced -> "Fastest" cost_optimized -> "Cheapest" Ask which one they want (and confirm the region — default USA). Then call create_agent with the chosen objective mapped to intent.optimizeFor: Quality -> 'quality', Fastest -> 'latency', Cheapest -> 'cost' plus intent.region. The server then pins that tier's failover stack automatically, so the created agent matches exactly what you previewed.
agents.preview_stacks
Search bundled Speko docs. Returns slug, title, score, snippet. Use this to look up SDK usage, API request/body shapes, and migration steps without leaving the MCP session. For example, after a Speko API validation error, search the failing field name to find the correct shape. Each hit's `slug` can be opened as the `spekoai://docs/{slug}` resource; `spekoai://docs/index` lists every bundled doc.
docs.search
Get the ordered transcript and per-turn latency for a workspace session.
sessions.transcript.get
Synthesize speech from text, returning base64 audio. Routed across TTS providers by the intent. The audio is returned as base64 with its content type and sample rate so a client can save or play it.
audio.synthesize
Start an agent-to-agent test call. Dispatches the agent under test plus a caller (a persona synthesized from `objective`, or another agent via `caller_agent_id`) into ONE LiveKit room with NO phone/SIP leg — so it CANNOT hairpin the way dialing the agent's own number does. Returns immediately with session ids; the conversation runs in the background. To review it: poll calls.get(agentSessionId) until it ends, then read sessions.transcript.get(agentSessionId) and calls.recording.get(agentSessionId). Provide exactly one of objective / caller_agent_id / caller_system_prompt.
agents.test_call
Transcribe audio to text. Speech to text only: no audio is generated and none is returned.
audio.transcribe

Speko FAQ

How do I improve a ChatGPT Plugin's discoverability?

The levers are the listing surface agents actually read: names, descriptions, keywords, tool metadata, and registry health. Which lever matters depends on where discovery breaks, which is what continuous measurement shows.

What are Speko alternatives on ChatGPT?

As of 2026-09-02, Speko competes with Aira, Aiva, Autocalls AI, CALL-E, InfiniteWatch, KaiCalls, Neria, Pathors, Retell AI, Tough Tongue AI, VeraDial in ChatGPT AI Voice Agents & Contact Center, ranked by public Discoverability Score.

Where is this profile measured?

This profile uses the geography attached to the latest public registry snapshot: US. Locale tags are intentionally omitted.