Cadenya

Cadenya is a hosted agent runtime for teams that want to develop agent behavior without building every execution primitive themselves. It layers agents, tools, objectives, memory, model choices, and embeddable widgets into one environment. Developers can define an agent, connect capabilities, run objectives, and create variations that swap models or behavior for comparison. The vendor emphasizes iterative experimentation: a team can test a canary variation against a default, observe results, and evolve an agent while retaining the surrounding runtime. Cadenya is MCP-compatible in the client role. Its homepage explicitly says users can connect existing MCP servers, OpenAPI specifications, and endpoints through one tool layer that hosted agents can consume. That makes it useful for composing internal services and third-party MCP tools without rewriting every integration. Practical applications include prototyping a support or operations agent, testing model changes, providing memory across loops, exposing an assistant through a product widget, and measuring competing agent configurations. The Launch plan costs $20 per month and includes $20 in usage credit. Additional usage is itemized: loops range from $0.0025 down to $0.0005 depending on volume, active variations cost $1 each monthly, memory entries cost $0.02, and widgets cost $10 each per month. New accounts also receive $5 of preconfigured OpenRouter credit before users supply their own model-provider access. Builders should model total cost with real traffic and evaluate observability, retry behavior, tool permissions, memory retention, and vendor portability before placing a critical workflow entirely on the hosted runtime.