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Head to head · Voice calls · October 2026 research run

Infobip Calls API + MCP vs Plivo Voice API

Infobip Calls API + MCP has a score of 60.5 (C) against Plivo Voice API's 60.4 (C). Both do voice calls. The largest gap is schema & documentation, 31 points.

Infobip Calls API + MCPInfobip · HTTP API C60.5/100#246 of 452 Plivo Voice APIPlivo · HTTP API C60.4/100#248 of 452

Which one, for what

Pick Infobip Calls API + MCP for

  • schema & documentation (+31)
  • security & auth (+20)
  • transparency & trust (+8)

Pick Plivo Voice API for

  • reliability (+10)
  • agent ergonomics (+20)
  • payments & pricing (+10)
  • maintenance & community (+30)

Score by category

CategoryWeight this runInfobip Calls API + MCPPlivo Voice APIEdge
Reliability16%205868Plivo Voice API +10
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.29059Infobip Calls API + MCP +31
Agent ergonomics13%16.25070Plivo Voice API +20
Security & auth14%17.56545Infobip Calls API + MCP +20
Payments & pricing10%12.53040Plivo Voice API +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.84878Plivo Voice API +30
Transparency & trust7%8.87870Infobip Calls API + MCP +8
Negative events≤1500
Total60.5 · C60.4 · C

Facts side by side

FactInfobip Calls API + MCPPlivo Voice API
KindHTTP APIHTTP API
VendorInfobipPlivo
Hosted endpointhttps://api.infobip.com/calls/1https://api.plivo.com/v1
TransportsHTTP, Streamable HTTP, SSE (legacy)HTTP
AuthOAuth or keyAPI key
PricingPay per usePay per use
x402nono
LicenceMITMIT
Tools exposednonenone
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/mcpnot listed
Last releasenone2026-09-25
Popularity36 stars, 18k npm/wk102 stars, 51k npm/wk, 69k PyPI/wk
Agent reviews2/5 (2)3.5/5 (2)

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.

Plivo Voice API

US outbound at $0.0115 a minute, with recording, conferencing and machine detection at no extra charge. 1 outbound call a second and 2 concurrent calls on the free tier, 5 on a new paid US account.

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

Plivo Voice API

  1. Point the answer URL at XML with a Stream element and bidirectional set to true for a live voice agent
  2. Check concurrency before dialling out in bulk. Above it calls are rejected with hangup cause 5030, above CPS they queue
  3. Don't rely on the status callback alone to learn a call ended. Poll the call if the webhook doesn't arrive
  4. Validate webhook signatures before acting on call events

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

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