# OpenClaw voice-call plugin vs a hosted MCP server (2026): Which is easier for phone calls? By Samuel Oram-Jones OpenClaw's official voice-call plugin costs nothing to install, and then asks for three things before an agent can dial anyone: an account with Twilio, Telnyx, or Plivo, a from-number on that account, and a webhook URL that the public internet can reach. A webhook URL is the address a carrier sends call events to. A hosted MCP server asks for a web address and a key or a sign-in. Most of the choice comes down to that gap. Below, the plugin sits beside four hosted servers, led by Bland's Agent Phone Plan, as of November 2026. Every other option is in [AI agent phone plans compared](/compare/agent-phone-plan). ## Is the OpenClaw voice-call plugin or a hosted MCP server easier for phone calls? A hosted MCP server such as Bland's is easier than the OpenClaw voice-call plugin, because the server arrives with the carrier, the number, and the webhook already running, while the plugin leaves all three to the owner. MCP, the Model Context Protocol, is a standard way for an AI app to use an outside tool, and a hosted MCP server is that tool running on another company's servers at a web address. The plugin runs inside the OpenClaw Gateway, and OpenClaw's setup fails when the webhook address resolves to the machine itself or a private network, so the owner sets up a public URL or a tunnel first. An OpenClaw owner adds Bland's MCP server under mcp.servers in ~/.openclaw/openclaw.json, with the key in the BLAND_API_KEY environment variable, or asks OpenClaw to sign itself up from Bland's docs, and Bland's plan supplies one dedicated US number that calls and texts in both directions. The [OpenClaw phone calls](/ai-phone-number/openclaw-phone-calls) page walks through it. | Option | Number | Calls in | What setup needs | Price as published | |---|---|---|---|---| | Bland Agent Phone Plan | One dedicated US local number | Yes | Server URL plus an API key, or a self-signup the owner approves | $9.99 for the first month (once per account owner), then $19.99 a month; the first plan purchase includes $10 of international calling credits | | OpenClaw voice-call plugin | None supplied; the owner brings one | Yes, off by default | Carrier account, credentials, a from-number, and a public webhook URL | Free (MIT license); carrier and model charges on the owner's accounts | | ClawCall | Shared on Unlimited; dedicated caller ID on Unlimited Reserve | Unlimited Reserve Plus, or a connected Twilio number | Sign-in to ClawCall; a ClawHub skill for OpenClaw | $8.99, $14.99, or $18.99 a month | | AgentPhone | One dedicated number per agent | Yes | Server URL plus a browser sign-in or an API key | $3.00 a number a month, plus per-minute and per-text charges | | call4me | Free US number on the first call, or the person's own | Callbacks to the call4me number | Server URL plus a Google or X sign-in, or an API key | $0.25 a minute from pickup, from prepaid credits | ## What are the options for OpenClaw phone calls, with examples? OpenClaw phone calls run either through the OpenClaw voice-call plugin, which the owner wires to a carrier, or through a hosted MCP server such as Bland, ClawCall, AgentPhone, or call4me. ### Bland's Agent Phone Plan Bland's Agent Phone Plan gives an AI agent one US local number, provisioned on subscribing, that places and takes calls and sends and receives texts. When someone texts back, Bland answers from the number toward the goal the agent was given. The agent asks about a delivery window or requests an appointment change, then reports back with a transcript and summary. Calls and texts go to US and Canada numbers, unlimited subject to fair use, with published caps of one call at a time across the account, 50 calls and 1,000 call minutes a day, up to 60 minutes per outbound call, and 100 texts a day. The first plan purchase also includes an extra $10 of international calling credits, so the agent can make international calls, and the plan includes live call transfer to the owner and voice cloning. Bland's [MCP server for phone calls and SMS](https://www.bland.ai/ai-phone-number/phone-call-mcp-server) page covers the other AIs Bland connects to.

Pros

Cons

### The OpenClaw voice-call plugin The OpenClaw voice-call plugin is free, MIT-licensed software from the OpenClaw Foundation that places and takes phone calls through Twilio, Telnyx, or Plivo. The plugin supplies no number. Realtime voice runs on Google Gemini Live or OpenAI, and transcription on providers such as Deepgram or ElevenLabs, each on the owner's own account. By default, the plugin places one outbound call at a time and rejects the rest, ends every call at 300 seconds, keeps inbound calls switched off until the owner sets an allowlist, pairing, or open policy, and leaves recording off.

Pros

Cons

### ClawCall ClawCall is a finished AI calling agent with a hosted MCP server, and OpenClaw reaches it through a ClawCall skill from ClawHub. ClawCall's $8.99 Unlimited plan calls from shared ClawCall numbers, Unlimited Reserve at $14.99 adds a dedicated US caller ID, and Unlimited Reserve Plus at $18.99 adds inbound calls. ClawCall calls US numbers only, places one outbound call at a time, and sends no texts from a number. [Shared vs dedicated numbers](/blog/shared-vs-dedicated-phone-number-for-ai-agents) compares the two. ### AgentPhone AgentPhone is a developer telephony API with a hosted MCP server, reached by web address with a browser sign-in or an API key, and AgentPhone names OpenClaw among its MCP clients. Each agent gets its own US or Canadian number. AgentPhone sends and receives texts, but outbound US texts wait on 10DLC registration, the US carriers' sign-up for business texts from ordinary 10-digit numbers, and outbound calls need a real payment method on file. ### call4me call4me is a hosted MCP server that phones businesses for a person's AI assistant, signing the person in with Google or X, or taking an API key. Every account gets a free US number on its first call, or the person can verify their own number as caller ID. The free number reaches the US, Canada, the EU, the UK, Japan, and a few more countries. ## What does each option cost? Bland's Agent Phone Plan costs $9.99 for the first month (once per account owner), then $19.99 a month, and renews monthly on the card on file until cancelled, while the OpenClaw voice-call plugin is free software whose carrier and model charges land on the owner's own accounts. Cancel in Billing and Plans or through the API. There is no trial on the plan, but Bland lets a person try it for free. That try covers outbound calls only, from a shared Bland number: no dedicated number, no texting, no incoming calls. For an agent making 300 minutes of outbound calls in a month, the totals below are worked from each company's published prices: - **Bland:** $19.99 after the first month, with texts and inbound calls included - **OpenClaw voice-call plugin on Twilio:** $5.35, from a $1.15 local number and 300 minutes at $0.0140, before the voice model's charges and any other Twilio features - **ClawCall:** $8.99 on shared numbers, or $14.99 with a dedicated caller ID, with no texts - **AgentPhone:** $42.00 with the owner's own agent over webhook at $0.13 a minute, or $69.00 with AgentPhone's hosted agent at $0.22, plus $0.02 a text and a one-time 10DLC fee from $25 - **call4me:** $75.00 at $0.25 a minute from pickup, with hold time at half price and unanswered calls free ## Which should I choose, the OpenClaw voice-call plugin or a hosted MCP server? An OpenClaw owner who wants the agent to call and text from its own number should choose a hosted MCP server, and Bland's Agent Phone Plan gives that number at one monthly price, while the OpenClaw voice-call plugin suits a developer who already runs a carrier account and wants every part under their own control. More calls at once need Bland's Build plan, on the pricing page, and Enterprise pricing is custom, set with Bland's sales team.

Use Bland when

Use the OpenClaw voice-call plugin when

A ranked list of the [best OpenClaw phone call tools](/blog/best-openclaw-phone-call-tools) covers the wider field, [Bland Agent Phone Plan vs ClawCall](/compare/agent-phone-plan-vs-clawcall) and [Bland Agent Phone Plan vs AgentPhone](/compare/agent-phone-plan-vs-agentphone) go deeper, and plan details are on Bland's [AI phone number](https://www.bland.ai/ai-phone-number) page. Bland isn't partnered with or endorsed by OpenAI, Anthropic, or Google. ## Frequently asked questions ### Is the OpenClaw voice-call plugin easier than a hosted MCP server? No, a hosted MCP server is easier, because the OpenClaw voice-call plugin needs a carrier account, a from-number, and a public webhook URL before the first call, while Bland's MCP server needs a config entry and a key. ### Which option costs least? The OpenClaw voice-call plugin on a Twilio number has the lowest carrier bill, $5.35 for 300 outbound minutes worked from Twilio's published prices, before the voice model's charges. At 300 minutes a month, ClawCall's $8.99 plan is the cheapest hosted option, on shared numbers with no texts. Bland's plan costs $19.99 a month after the first, whatever the minutes, within fair use and its daily caps. ### Which option works with ChatGPT or Claude? Bland, ClawCall, and call4me each work with ChatGPT and Claude, while the OpenClaw voice-call plugin runs only inside OpenClaw. In ChatGPT, a person turns on developer mode for apps and connectors, adds Bland's MCP server as a custom connector, and signs in with Bland; ChatGPT then places outbound calls and reads results, and the plan is bought in the Bland dashboard. An owner should check that the ChatGPT plan in use can add a custom connector with write actions before subscribing. In the Claude app, a person adds a custom connector under Settings, Connectors, pointing at Bland's MCP server, then signs in with Bland. ### Can the OpenClaw voice-call plugin send texts? No, the OpenClaw voice-call plugin carries voice calls only. Bland's Agent Phone Plan sends and receives texts on the agent's own number, and AgentPhone texts too once outbound US texts clear 10DLC registration. ### How long can a call last on the OpenClaw voice-call plugin? Five minutes by default: the OpenClaw voice-call plugin ends every call at 300 seconds, a hard cap the owner can raise in its configuration. Bland's Agent Phone Plan allows up to 60 minutes on an outbound call. ### Do these calls say they come from an AI? AgentPhone's outbound calls through its MCP server always open by identifying the agent as an AI, ClawCall and call4me confirm they are an AI when asked, and the OpenClaw voice-call plugin speaks its identity introduction only when asked unless the owner changes it. Bland's call tool takes a first sentence the agent sets, and Bland's API has an AI-disclosure guard rail that a caller can turn on.