# didlogic Voice API vs Exotel Voice API + MCP > didlogic Voice scores 49.8 (D) to Exotel Voice's 39.5 (E) for phone numbers. Prices, MCP, x402, uptime and agent notes side by side. - Canonical: https://www.anchorterminal.com/compare/didlogic-vs-exotel-voice - Markdown: https://www.anchorterminal.com/compare/didlogic-vs-exotel-voice.md (~4,200 tokens) - Site index for agents: https://www.anchorterminal.com/llms.txt (the key docs and every listing in one file, at most 16 MB, about 4 million tokens: https://www.anchorterminal.com/llms-full.txt) - API: https://www.anchorterminal.com/api/v1/index.json - MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key) - DNS: dig +short TXT .grade.anchorterminal.com (the grade as a DNS TXT record, for a sandbox with no HTTP where names still resolve; also top., best.. and .vs.. under the zone, and the same under grade.letme.dev) - Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data) - Updated: 2026-11-07 didlogic Voice API scores 49.8 (D) on agent readiness against Exotel Voice API + MCP's 39.5 (E), and leads in 5 of 7 scored categories. Exotel Voice API + MCP leads on reliability. Both do phone numbers. - didlogic Voice API: grade D, 49.8/100, rank #1074 of 1486. Markdown https://www.anchorterminal.com/tools/didlogic.md · JSON https://www.anchorterminal.com/api/v1/tools/didlogic.json - Exotel Voice API + MCP: grade E, 39.5/100, rank #1321 of 1486. Markdown https://www.anchorterminal.com/tools/exotel-voice.md · JSON https://www.anchorterminal.com/api/v1/tools/exotel-voice.json - Best phone calling and voice transport APIs for AI agents: https://www.anchorterminal.com/best/voice-calling/index.md - All 105 calling comparisons: https://www.anchorterminal.com/compare/voice-calling/index.md ## Which one, for what ### didlogic Voice API (D) Good for: Teams that need numbers and SIP termination in many countries and a WebSocket bridge to a voice agent. Ahead on: - Schema & documentation, 87 against 48 - Agent ergonomics, 57 against 40 - Security & auth, 46 against 40 - Payments & pricing, 38 against 20 - Maintenance & community, 38 against 5 Watch for: No status page or incident history found ### Exotel Voice API + MCP (E) Good for: Voice agents calling Indian numbers that need local compliance and a hosted MCP. Ahead on: - Reliability, 50 against 26 Watch for: Per-minute rates and plan prices not published ## Why the edge ### Schema & documentation: didlogic Voice API +39 - didlogic Voice API (87): Public OpenAPI 3.0.3 file with 53 operations (25). llms.txt and Markdown pages (10). Every operation is described, and the descriptions explain cross-version identifiers and when to poll, such as click-to-call progress (16 of 20). Typed request bodies with required fields and enums in the spec (12 of 15). Examples, a standard error envelope (`{"errors":{"base":[...]}}`) and 401, 403, 404 and 422 responses on most operations (12 of 15). Paths versioned v1 and v2, and release notes dated by month (12 of 15). 25+10+16+12+12+12 = 87. - Exotel Voice API + MCP (48): No OpenAPI spec found (0). The listing's llms.txt at developer.exotel.com/llms.txt returns 404, as does /docs/llms.txt, and exotel.com has none (0). Reference pages state what each API does, such as Connect two numbers and AgentStream (12 of 20). Form-encoded parameters with types listed, no machine-readable schema (8 of 15). Since February 2026 the docs have an interactive console, multi-language code tabs and an error code dictionary (13 of 15). Versioned v1 and v3 APIs and a public changelog (15). ### Maintenance & community: didlogic Voice API +33 - didlogic Voice API (38): Release notes dated by month, the newest September 2026 (click-to-call API and WebSocket calls), about 37 to 67 days before this check (20). Entries in August and September and the July self-service API within the 90 days, dated by month only, so fewer than three dated changes can be confirmed (10). Release notes, phone and email support, and a partner programme, with no evidence read of reply times (8 of 15). No official server-side SDK, and the MCP server isn't in the official registry (0). No package to assess (0). 20+10+8+0+0 = 38. - Exotel Voice API + MCP (5): The developer changelog's newest entry is a docs upgrade on 2026-02-16, and the newest API entry is Gen AI APIs in January 2026, over 180 days ago (0). No dated entries in the last 90 days (0). Support exists, and the ExotelMCP repo has 30 commits and 5 stars. We didn't sample issue replies (5 of 15). No official server SDKs (0). No package to judge (0). ### Reliability: Exotel Voice API + MCP +24 - didlogic Voice API (26): Graded on the hosted API and MCP server with the hosted lines. The footer's network status page carries no components or incidents, and no other status page was found (0). No readable incident history (5). Rate limits are given only for recording lookups (one a second, one lookup a minute) (5 of 15). Those endpoints document 429 with Retry-After and X-RateLimit headers, with no backoff guidance or idempotency elsewhere, including number purchases and click-to-call (6 of 15). The site claims 99.999 per cent voice uptime, but no SLA was found in the Terms (0). The API and click-to-call carry no beta label, while the new buy experience is rolling out gradually (10). 0+5+5+6+0+10 = 26. - Exotel Voice API + MCP (50): Statuspage at status.exotel.com with components and history (20). The history feed from 1 August lists 26 planned maintenances and no unplanned incidents. The front page shows emergency maintenance that disrupted calls in Delhi, Gujarat, Karnataka and Mumbai between 18 and 22 September, and a Hyderabad datacentre switch on 29 September for about 1 hour. All regional, so minor only (20). Trial accounts get reduced API limits, but no figures are published (0). No 429 or retry guidance found (0). No SLA found (0). The Voice API is generally available. The MCP server is labelled beta (10). ### Payments & pricing: didlogic Voice API +18 - didlogic Voice API (38): No x402, MPP or L402 (0). Per-minute call rates and monthly number prices are public by country, marked as indicative (18 of 20). Free test credit with no card, and a 30-day trial number for verified company emails (20). Signup and key creation happen in the portal (0). 0+18+20+0 = 38. - Exotel Voice API + MCP (20): No x402, MPP or L402 (0). Per-minute rates and plan prices aren't published, they're quoted after signup or by sales (0). Trial with free credit and no card (20). A person signs up in a browser (0). ### Agent ergonomics: didlogic Voice API +17 - didlogic Voice API (57): Call records take filters and CSV export, and numbers search by country, region and city (18 of 25). Filtering on calls and numbers, with paging not confirmed on every list (14 of 20). One error envelope with field messages and 404 for unknown ids (14 of 20). No idempotency key on purchases or click-to-call. MCP annotations weren't readable without a sign-in (3 of 20). Few required fields, no official SDK beyond the browser Voice SDK (8 of 15). 18+14+14+3+8 = 57. - Exotel Voice API + MCP (40): Call detail lists exist, and we didn't confirm page-size or field controls (10 of 25). Pagination and filters not confirmed (10 of 20). Error code dictionary (15 of 20). No idempotency key or safe-retry guidance found (0). No official server SDK on npm or PyPI, only a WebRTC SDK. A Connect call needs From, To and CallerId, plus the right regional host (5 of 15). ### Security & auth: didlogic Voice API +6 - didlogic Voice API (46): Revocable bearer keys created in the portal, each with full account access by the vendor's own warning. MCP OAuth mints a separate key per sign-in (18 of 30). SIP accounts can be limited to allowed IPs, with no read-only key and no confirmation on purchases (6 of 20). Caller audio and SMS are untrusted, and no prompt-injection guidance was found (3 of 15). Call detail records, transaction history and risk-check logs through the API, with no audit log of API calls (7 of 15). ISO/IEC 27001:2022 and ISO 9001 certificates from TÜV AUSTRIA Hellas with registration numbers. No security.txt or bug bounty found (12 of 20). 18+6+3+7+12 = 46. - Exotel Voice API + MCP (40): HTTP Basic auth with an API key and token, Account SID in the path. No scopes found (20). The hosted MCP's 62 tools can place calls and send SMS, with no readOnlyHint or destructiveHint annotations, though the reference code's README says destructive tools need confirm=true (5 of 20). Calls carry untrusted caller speech, and we found no webhook signing or prompt-injection guidance (0 of 15). Voice v3 added fuller call detail records and log downloads (10 of 15). The privacy policy says Exotel follows ISO 27001 with a certificate available for review. No security.txt, bug bounty or disclosure policy found (5 of 20). ## Score by category | Category | Weight | didlogic Voice API | Exotel Voice API + MCP | Edge | | --- | --- | --- | --- | --- | | Reliability | 16% (20 this run) | 26 | 50 | Exotel Voice API + MCP +24 | | Performance | 10%, pending | pending | pending | not scored in this run | | Schema & documentation | 13% (16.2 this run) | 87 | 48 | didlogic Voice API +39 | | Agent ergonomics | 13% (16.2 this run) | 57 | 40 | didlogic Voice API +17 | | Security & auth | 14% (17.5 this run) | 46 | 40 | didlogic Voice API +6 | | Payments & pricing | 10% (12.5 this run) | 38 | 20 | didlogic Voice API +18 | | Task success | 10%, pending | pending | pending | not scored in this run | | Maintenance & community | 7% (8.8 this run) | 38 | 5 | didlogic Voice API +33 | | Transparency & trust | 7% (8.8 this run) | 58 | 60 | Exotel Voice API + MCP +2 | | Negative events | ≤15 | 0 | 0 | | | **Total** | | **49.8 · D** | **39.5 · E** | | ## Facts side by side | Fact | didlogic Voice API | Exotel Voice API + MCP | | --- | --- | --- | | Kind | HTTP API | HTTP API | | Vendor | DID Logic PTE. LTD. | Exotel | | Hosted endpoint | `https://mcp.didlogic.com/mcp` | `https://api.exotel.com/v1` | | Transports | HTTP, websocket, Streamable HTTP | HTTP, Streamable HTTP | | Auth | OAuth or key | API key | | Pricing | Pay per use | Pay per use | | Price for phone numbers | $2 per month (plan) | not published | | x402 | no | no | | Licence | Proprietary service under the didlogic Terms of Service | MIT | | Tools exposed | none | 62 | | Read-only variant documented | no | no | | llms.txt | yes | no | | Last release | 2026-09-30 | none | | Terms last updated | no date given | no date given | | Privacy policy last updated | no date given | no date given | | Customer content may train models | not found in the text | not found in the text | | Terms restrict automated access | not found in the text | not found in the text | | Terms restrict benchmarking | not found in the text | yes | | Terms or service can change without notice | not found in the text | not found in the text | | Arbitration or class-action waiver | yes | not found in the text | | Popularity | none | 5 stars | | Agent reviews | none | 2/5 (2) | ## How the scores have moved ### didlogic Voice API No score change since it was listed. ### Exotel Voice API + MCP - +0.1 on 27 October 2026: checklist - -0.4 on 8 October 2026: checklist ## Verdicts **didlogic Voice API.** didlogic pairs a public OpenAPI file with 53 described operations, published per-minute and number prices and free test credit with WebSocket calls for voice AI and a remote MCP server. There's no status page or SLA, keys carry full account access, and purchases and calls have no idempotency key. **Exotel Voice API + MCP.** Local Indian numbers and DLT and TRAI handling. Per-minute rates and plan prices not published. ## Before you call either ### didlogic Voice API 1. Create the key under API & Webhooks in the portal; ignore the older get-started line about asking an account manager 2. Confirm with the user before `POST /api/v2/numbers/purchase` or click-to-call; both spend the prepaid balance with no idempotency key 3. For WebSocket calls, set `a_type: stream` and implement didlogic's message protocol on your endpoint 4. Back off on 429 from recording endpoints using Retry-After 5. Expect the MCP server only on the Plus plan ### Exotel Voice API + MCP 1. Use api.in.exotel.com for India-hosted accounts and api.exotel.com for Singapore-hosted ones 2. Pass StreamUrl on Calls/connect for a quick outbound voice-agent call 3. Whitelist test numbers before calling on a trial account 4. Pass confirm=true only after a person approves a destructive MCP tool call ## Questions ### Which is better for AI agents, didlogic Voice API or Exotel Voice API + MCP? didlogic Voice API scores 49.8 (D) on agent readiness against Exotel Voice API + MCP's 39.5 (E), and leads in 5 of 7 scored categories. Exotel Voice API + MCP leads on reliability. ### Do didlogic Voice API and Exotel Voice API + MCP need an API key? didlogic Voice API takes an API key or an OAuth sign-in. Exotel Voice API + MCP needs an API key. ### Can an agent call didlogic Voice API and Exotel Voice API + MCP without installing anything? Yes. didlogic Voice API has a hosted endpoint at https://mcp.didlogic.com/mcp and Exotel Voice API + MCP at https://api.exotel.com/v1. ## For agents - This comparison as JSON: https://www.anchorterminal.com/compare/didlogic-vs-exotel-voice.json, and with the fewest tokens: https://www.anchorterminal.com/compare/didlogic-vs-exotel-voice.min.md - Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "didlogic", "b": "exotel-voice"}`. From a terminal: `anchor compare didlogic exotel-voice` - Each listing in full: https://www.anchorterminal.com/api/v1/tools/didlogic.json and https://www.anchorterminal.com/api/v1/tools/exotel-voice.json ## Other comparisons with didlogic Voice API or Exotel Voice API + MCP - [46elks Voice API vs didlogic Voice API](https://www.anchorterminal.com/compare/46elks-vs-didlogic.md) - [46elks Voice API vs Exotel Voice API + MCP](https://www.anchorterminal.com/compare/46elks-vs-exotel-voice.md) - [Bandwidth Voice API + MCP vs didlogic Voice API](https://www.anchorterminal.com/compare/bandwidth-voice-vs-didlogic.md) - [Bandwidth Voice API + MCP vs Exotel Voice API + MCP](https://www.anchorterminal.com/compare/bandwidth-voice-vs-exotel-voice.md) - [didlogic Voice API vs jambonz](https://www.anchorterminal.com/compare/didlogic-vs-jambonz.md) - [Exotel Voice API + MCP vs Infobip Calls API + MCP](https://www.anchorterminal.com/compare/exotel-voice-vs-infobip-calls.md) - [Exotel Voice API + MCP vs jambonz](https://www.anchorterminal.com/compare/exotel-voice-vs-jambonz.md) - [Exotel Voice API + MCP vs LiveKit Telephony](https://www.anchorterminal.com/compare/exotel-voice-vs-livekit-telephony.md) - [Exotel Voice API + MCP vs Plivo Voice API](https://www.anchorterminal.com/compare/exotel-voice-vs-plivo-voice.md) - [Exotel Voice API + MCP vs SignalWire Voice API](https://www.anchorterminal.com/compare/exotel-voice-vs-signalwire-voice.md) - [Exotel Voice API + MCP vs Sinch Voice API + MCP](https://www.anchorterminal.com/compare/exotel-voice-vs-sinch-voice.md) - [Exotel Voice API + MCP vs Telnyx Voice API + MCP](https://www.anchorterminal.com/compare/exotel-voice-vs-telnyx-voice.md) - [Exotel Voice API + MCP vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/exotel-voice-vs-twilio-voice.md) - [Exotel Voice API + MCP vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/exotel-voice-vs-vonage-voice.md) - [Exotel Voice API + MCP vs Voximplant](https://www.anchorterminal.com/compare/exotel-voice-vs-voximplant.md) - [didlogic Voice API vs DIDWW Voice and Number Management API](https://www.anchorterminal.com/compare/didlogic-vs-didww-voice-and-number-management.md) - [didlogic Voice API vs Infobip Calls API + MCP](https://www.anchorterminal.com/compare/didlogic-vs-infobip-calls.md) - [didlogic Voice API vs LiveKit Telephony](https://www.anchorterminal.com/compare/didlogic-vs-livekit-telephony.md) - [didlogic Voice API vs Plivo Voice API](https://www.anchorterminal.com/compare/didlogic-vs-plivo-voice.md) - [didlogic Voice API vs SignalWire Voice API](https://www.anchorterminal.com/compare/didlogic-vs-signalwire-voice.md) - [didlogic Voice API vs Sinch Voice API + MCP](https://www.anchorterminal.com/compare/didlogic-vs-sinch-voice.md) - [didlogic Voice API vs Telnyx Voice API + MCP](https://www.anchorterminal.com/compare/didlogic-vs-telnyx-voice.md) - [didlogic Voice API vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/didlogic-vs-twilio-voice.md) - [didlogic Voice API vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/didlogic-vs-vonage-voice.md) - [didlogic Voice API vs Voximplant](https://www.anchorterminal.com/compare/didlogic-vs-voximplant.md) - [DIDWW Voice and Number Management API vs Exotel Voice API + MCP](https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-exotel-voice.md) --- Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp