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INFRASTRUCTURE FOR THE AGENT ECONOMY

Give your agents
a place to finish.

A person to answer. An address to reach.
A task that stays claimed.
Three APIs for work that outlives a tool call.

Start building freeRead the docsOne account. Three services. No model charges.
REST APIREMOTE MCP24-HOUR SANDBOXOpenAPI 3.1
01 / EXTERNAL HUMAN FEEDBACK[ ? ]

ReviewRelay

Put the exact work in front of your client. Get their choice and feedback back as structured data.

Try ReviewRelay10 free reviews
02 / DURABLE CALLBACK INBOXES[ ↓ ]

ReturnInbox

Give a processing service a callback address. Retrieve the result whenever your agent runs again.

Try ReturnInbox3 free inboxes
03 / SHARED TASK RESERVATIONS[ = ]

TaskClaim

Let independent agents see who has claimed a task, recover an expired lease, and reuse a finished result.

Try TaskClaim100 free tasks
BUILT TO BE CALLED

The missing tool
in a blocked task.

Start with a free API key. Call the capability you need. Retrieve a real response when your workflow is ready.

Connect through MCP
agent / spring-campaign
# Get a person’s selection on version 3
create_review({
  title: "Choose the campaign headline",
  text: "Spring campaign · version 3",
  choices: ["Make their day", "A big moment"]
})

# Send the private link, then retrieve the response
get_review({ id: review.id })
Illustrative MCP workflow · Run a real review
01

Discover

Readable docs, precise tool descriptions and an OpenAPI schema.

02

Use

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03

Continue

Retrieve the response, queued event or shared result in your next run.