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Managed API / SOURCE-BASED REVIEW

Miss Blue : an agent line with an operator close by

Miss Blue is our featured choice for a business agent that needs a dedicated number, project-scoped access and a shared place for people to take over. Its API and MCP paths support bringing your own agent into the messaging workflow.

By Agent Envelope editorial · Sources checked October 2, 2026

OUR TAKE

An agent line with an operator close by

Miss Blue is our featured choice for a business agent that needs a dedicated number, project-scoped access and a shared place for people to take over. Its API and MCP paths support bringing your own agent into the messaging workflow.

Make the line part of the agent’s identity

The starting point is a business project with its own provisioned line. The published API and CLI expose threads, messages, delivery state and sending actions, giving the application context beyond a single prompt.

Choose the exact line explicitly when a project holds several numbers. The CLI reference says it stops rather than guessing; your own application should preserve the same clear sender choice.

Keep people in the conversation

An operator inbox is useful only when the application knows when to stop answering. Define escalation for uncertain facts, failed tools and requests requiring a person, then test whether the operator can see the relevant thread.

The published promotional line rate is $99 per month. Managed conversational AI has separate pricing, while bringing your own agent uses the API path. Budget and test the arrangement you actually choose.

Start with a bounded launch

Miss Blue publishes a recommendation of roughly 30 new outbound conversations per line per day for healthy use. That is distinct from the default new-contact controls described in workflow documentation and is not an Apple-wide guaranteed allowance.

An agent should honor a documented opt-in and contact policy. Unlimited billing does not authorize unlimited initiation, and a retry should not create another customer-visible message when the outcome is uncertain.

The decision in one sentence

Consider Miss Blue when an agent line with an operator close by fits your operating plan, then verify the constraints above.

Read the primary sources

These are the provider’s own descriptions. Prices and product claims are dated snapshots, and performance claims are not our test results.