Start free, then upgrade as your production traffic grows. Need volume or an SLA? Talk to us.
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Ship your first AI product without watching every call
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For agents in production that real users depend on
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High-volume or multi-agent systems
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Volume, compliance, and hands-on support for larger teams
Every HTTP call routed through the Callio gateway counts as one request, regardless of the upstream API, method, or payload size. Sandbox key traffic never counts toward your quota.
500 proxy requests per month and 2 sandbox keys so you can build, test, and install MCP into your agent before committing to a paid tier. No card required.
Requests return a 429 until the next billing period or until you upgrade to a higher tier. Sandbox keys are not counted toward monthly plan limits.
For most upstream APIs, yes — you bring your own key (e.g., your OpenAI key, your SendGrid key) and Callio injects it at the proxy. It is stored encrypted at rest. Some public APIs work without any provider key.
Callio uses bank-grade zero-trust security. All provider API keys and OAuth tokens are encrypted at rest using AES-256-GCM authenticated encryption. Request payload bodies pass through in-flight over TLS 1.3 and are never stored on disk (zero data retention). Only non-sensitive metadata (status codes, latency) is logged for your telemetry dashboard.
Yes. Upgrade instantly and the new limits take effect immediately. Downgrade takes effect at the end of your current billing period. No lock-in contracts on self-serve plans.
Custom volume, SLAs, security reviews, dedicated support, and annual invoicing — contact us and we'll tailor a plan to your agent traffic and compliance needs.