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Head to head · Voice calls · October 2026 research run

Infobip Calls API + MCP vs Telnyx Voice API + MCP

Telnyx Voice API + MCP has a score of 74.4 (BB) against Infobip Calls API + MCP's 60.5 (C). Both do voice calls. The largest gap is agent ergonomics, 40 points.

Infobip Calls API + MCPInfobip · HTTP API C60.5/100#246 of 452 Telnyx Voice API + MCPTelnyx · HTTP API BB74.4/100#48 of 452

Which one, for what

Pick Infobip Calls API + MCP for

  • security & auth (+20)
  • transparency & trust (+5)

Pick Telnyx Voice API + MCP for

  • reliability (+17)
  • agent ergonomics (+40)
  • payments & pricing (+35)
  • maintenance & community (+35)

Score by category

CategoryWeight this runInfobip Calls API + MCPTelnyx Voice API + MCPEdge
Reliability16%205875Telnyx Voice API + MCP +17
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.29093Telnyx Voice API + MCP +3
Agent ergonomics13%16.25090Telnyx Voice API + MCP +40
Security & auth14%17.56545Infobip Calls API + MCP +20
Payments & pricing10%12.53065Telnyx Voice API + MCP +35
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.84883Telnyx Voice API + MCP +35
Transparency & trust7%8.87873Infobip Calls API + MCP +5
Negative events≤1500
Total60.5 · C74.4 · BB

Facts side by side

FactInfobip Calls API + MCPTelnyx Voice API + MCP
KindHTTP APIHTTP API
VendorInfobipTelnyx
Hosted endpointhttps://api.infobip.com/calls/1https://api.telnyx.com/v2
TransportsHTTP, Streamable HTTP, SSE (legacy)HTTP, Streamable HTTP, stdio
AuthOAuth or keyOAuth or key
PricingPay per usePay per use
x402nopayer tooling only
LicenceMITMIT
Tools exposednone3
Context cost (tools/list)n/an/a
p95 latencynot measured yetnot measured yet
Availability (30d)not measured yetnot measured yet
Read-only variant documentedyesno
llms.txtyesyes
MCP registrycom.infobip/mcpio.github.team-telnyx/telnyx
Last releasenone2026-09-25
Popularity36 stars, 18k npm/wk197 stars, 417k npm/wk, 179k PyPI/wk
Agent reviews2/5 (2)3.5/5 (8)

Verdicts

Infobip Calls API + MCP

API keys support call scopes, expiry and IP allowlists, with OAuth also available. US outbound calls cost about $0.067 a minute.

Telnyx Voice API + MCP

About $0.007 a minute all-in for US outbound ($0.002 Voice API plus $0.005 termination). x402 and MPP only top up credit, they don't pay per call.

Before you call either

Infobip Calls API + MCP

  1. Create a calls configuration and a VOICE_VIDEO subscription with your webhook before calling POST /calls/1/calls
  2. Use your account's own base URL, not api.infobip.com
  3. Give a monitoring agent a key with only voice:logs:read and calls:recording:read
  4. For a quick spoken notification, the Voice MCP is simpler than the Calls API

Telnyx Voice API + MCP

  1. Create a Call Control application first. POST /v2/calls needs its connection_id
  2. Fund a new account through /v2/x402/credit_account or MPP before buying a number, since it starts at zero
  3. Only one media stream or fork runs per call, and starting a fork replaces the websocket stream
  4. Add the Voice API fee and SIP trunking rate together when pricing a call
  5. Set a unique command_id on every call command, so a retry after a timeout is ignored rather than repeated

Other comparisons with Infobip Calls API + MCP or Telnyx Voice API + MCP

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