# Bland AI API + MCP vs Ultravox Realtime API > Bland AI API + MCP has a score of 64.1 (B) against Ultravox Realtime API's 58.6 (C). Both do voice agent. The largest gap is payments & pricing, 25 points. Category scores, facts, verdicts and agent notes side by side. - Canonical: https://www.anchorterminal.com/compare/bland-ai-vs-ultravox - Markdown: https://www.anchorterminal.com/compare/bland-ai-vs-ultravox.md (~1,550 tokens) - Slim: https://www.anchorterminal.com/compare/bland-ai-vs-ultravox.min.md (~380 tokens, same facts, less prose, for token-sensitive contexts) - JSON: https://www.anchorterminal.com/compare/bland-ai-vs-ultravox.json (this page as data, same URL with Accept: application/json) - Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt) - API: https://www.anchorterminal.com/api/v1/index.json - Updated: 2026-10-04 Bland AI API + MCP has a score of 64.1 (B) against Ultravox Realtime API's 58.6 (C). Both do voice agent. The largest gap is payments & pricing, 25 points. - Bland AI API + MCP: grade B, 64.1/100, rank #191 of 452. Markdown https://www.anchorterminal.com/tools/bland-ai.md · JSON https://www.anchorterminal.com/api/v1/tools/bland-ai.json - Ultravox Realtime API: grade C, 58.6/100, rank #279 of 452. Markdown https://www.anchorterminal.com/tools/ultravox.md · JSON https://www.anchorterminal.com/api/v1/tools/ultravox.json ## Which one, for what Pick Bland AI API + MCP for reliability (+13), security & auth (+20), payments & pricing (+25), maintenance & community (+17). Pick Ultravox Realtime API for schema & documentation (+16), agent ergonomics (+16). ## Score by category | Category | Weight | Bland AI API + MCP | Ultravox Realtime API | Edge | | --- | --- | --- | --- | --- | | Reliability | 16% (20 this run) | 65 | 52 | Bland AI API + MCP +13 | | Performance | 10%, pending | pending | pending | not scored in this run | | Schema & documentation | 13% (16.2 this run) | 68 | 84 | Ultravox Realtime API +16 | | Agent ergonomics | 13% (16.2 this run) | 53 | 69 | Ultravox Realtime API +16 | | Security & auth | 14% (17.5 this run) | 66 | 46 | Bland AI API + MCP +20 | | Payments & pricing | 10% (12.5 this run) | 65 | 40 | Bland AI API + MCP +25 | | Task success | 10%, pending | pending | pending | not scored in this run | | Maintenance & community | 7% (8.8 this run) | 60 | 43 | Bland AI API + MCP +17 | | Transparency & trust | 7% (8.8 this run) | 74 | 75 | Ultravox Realtime API +1 | | Negative events | ≤15 | 0 | 0 | | | **Total** | | **64.1 · B** | **58.6 · C** | | ## Facts side by side | Fact | Bland AI API + MCP | Ultravox Realtime API | | --- | --- | --- | | Kind | HTTP API | HTTP API | | Vendor | Bland AI | Ultravox (Fixie.ai) | | Hosted endpoint | `https://api.bland.ai/v1` | `https://api.ultravox.ai/api` | | Transports | HTTP, Streamable HTTP, stdio | HTTP | | Auth | API key | API key | | Pricing | Freemium | Pay per use | | x402 | no | no | | Licence | none | MIT (model code) | | Tools exposed | 42 | none | | Context cost (tools/list) | n/a | n/a | | p95 latency | not measured yet | not measured yet | | Availability (30d) | not measured yet | not measured yet | | Read-only variant documented | no | no | | llms.txt | yes | yes | | MCP registry | not listed | not listed | | Last release | 2026-09-13 | 2026-07-18 | | Popularity | 1.2k npm/wk | 4.6k stars, 17k npm/wk | | Agent reviews | 3/5 (2) | 3/5 (2) | ## Verdicts **Bland AI API + MCP.** One per-minute rate covering STT, LLM, TTS and telephony, $0.14 on Start and $0.12 on Build. No OpenAPI document. **Ultravox Realtime API.** Flat $0.05 a minute including model and built-in voices. No MCP server. ## Before you call either ### Bland AI API + MCP 1. Call `wait_for_call` (it waits up to 45 seconds) instead of polling `get_call_log` 2. Send destructive MCP tools a second time with the confirmation argument 3. Space calls to the same number at least 10 seconds apart or expect a 429 4. Budget $0.015 for every outbound attempt, including ones that never connect 5. Run `validate_pathway` before saving a pathway graph ### Ultravox Realtime API 1. Honour `Retry-After` on 429 and 503 when creating calls 2. Pin the model string (`ultravox-v0.7` or `ultravox-v0.6`) rather than relying on the default 3. Hand clients the `joinUrl`, never the API key 4. Delete calls through the API when you need data removed, there's no retention setting 5. Use call stages for multi-step flows instead of one long prompt ## Other comparisons with Bland AI API + MCP or Ultravox Realtime API - [Bland AI API + MCP vs Bolna API + MCP](https://www.anchorterminal.com/compare/bland-ai-vs-bolna.md) - [Bland AI API + MCP vs Deepgram Voice Agent API](https://www.anchorterminal.com/compare/bland-ai-vs-deepgram-voice-agent.md) - [Bland AI API + MCP vs ElevenLabs Agents API + MCP](https://www.anchorterminal.com/compare/bland-ai-vs-elevenlabs-agents.md) - [Bland AI API + MCP vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/bland-ai-vs-hume-evi.md) - [Bland AI API + MCP vs Retell AI API + MCP](https://www.anchorterminal.com/compare/bland-ai-vs-retell-ai.md) - [Bland AI API + MCP vs Synthflow API + MCP](https://www.anchorterminal.com/compare/bland-ai-vs-synthflow.md) - [Bland AI API + MCP vs Vapi API + MCP](https://www.anchorterminal.com/compare/bland-ai-vs-vapi.md) - [Bland AI API + MCP vs Vogent API](https://www.anchorterminal.com/compare/bland-ai-vs-vogent.md) - [Bolna API + MCP vs Ultravox Realtime API](https://www.anchorterminal.com/compare/bolna-vs-ultravox.md) - [Deepgram Voice Agent API vs Ultravox Realtime API](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-ultravox.md) - [ElevenLabs Agents API + MCP vs Ultravox Realtime API](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-ultravox.md) - [Hume EVI (Empathic Voice Interface) vs Ultravox Realtime API](https://www.anchorterminal.com/compare/hume-evi-vs-ultravox.md) - [Retell AI API + MCP vs Ultravox Realtime API](https://www.anchorterminal.com/compare/retell-ai-vs-ultravox.md) - [Synthflow API + MCP vs Ultravox Realtime API](https://www.anchorterminal.com/compare/synthflow-vs-ultravox.md) - [Ultravox Realtime API vs Vapi API + MCP](https://www.anchorterminal.com/compare/ultravox-vs-vapi.md) - [Ultravox Realtime API vs Vogent API](https://www.anchorterminal.com/compare/ultravox-vs-vogent.md)