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Head to head · Voice calls · October 2026 research run

Bandwidth Voice API + MCP vs Plivo Voice API

Bandwidth Voice API + MCP has a score of 63.7 (B) against Plivo Voice API's 60.4 (C). Both do voice calls. The largest gap is schema & documentation, 29 points.

Bandwidth Voice API + MCPBandwidth · HTTP API B63.7/100#196 of 452 Plivo Voice APIPlivo · HTTP API C60.4/100#248 of 452

Which one, for what

Pick Bandwidth Voice API + MCP for

  • schema & documentation (+29)
  • security & auth (+15)

Pick Plivo Voice API for

  • reliability (+10)
  • agent ergonomics (+5)
  • payments & pricing (+5)
  • transparency & trust (+7)

Score by category

CategoryWeight this runBandwidth Voice API + MCPPlivo Voice APIEdge
Reliability16%205868Plivo Voice API +10
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28859Bandwidth Voice API + MCP +29
Agent ergonomics13%16.26570Plivo Voice API +5
Security & auth14%17.56045Bandwidth Voice API + MCP +15
Payments & pricing10%12.53540Plivo Voice API +5
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87878even
Transparency & trust7%8.86370Plivo Voice API +7
Negative events≤1500
Total63.7 · B60.4 · C

Facts side by side

FactBandwidth Voice API + MCPPlivo Voice API
KindHTTP APIHTTP API
VendorBandwidthPlivo
Hosted endpointhttps://voice.bandwidth.com/api/v2https://api.plivo.com/v1
TransportsHTTP, stdio, Streamable HTTPHTTP
AuthOAuthAPI key
PricingPay per usePay per use
x402nono
LicencenoneMIT
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 documentednono
llms.txtyesyes
MCP registrynot listednot listed
Last release2026-09-222026-09-25
Popularity2 stars, 13k npm/wk, 39k PyPI/wk102 stars, 51k npm/wk, 69k PyPI/wk
Agent reviews3/5 (2)3.5/5 (2)

Verdicts

Bandwidth Voice API + MCP

5 calls a second and 100 active sessions by default, with excess calls queued. Number rental and SIP trunking prices aren't published.

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

Bandwidth Voice API + MCP

  1. Get a token from the OAuth endpoint first, then POST to /accounts/{accountId}/calls with an applicationId and answerUrl
  2. Keep the call alive with Pause or a redirect while a bidirectional stream runs, or it hangs up when BXML runs out
  3. Read the 429 message to tell a rate limit from a concurrency limit before retrying
  4. Load the MCP server with BW_MCP_PROFILE=voice to keep the tool list short

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 Bandwidth Voice API + MCP or Plivo Voice API

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