Zambo

Day Pass activate

day_pass_activate

Destructive

Agent-native access activation endpoint. Accepts an optional payment envelope or existing access key and returns a payment challenge or verified activation result. Activation results include receipt URL, run ID, access key, expiration, usage guidance, and a spend receipt. Activation occurs only after a verified transfer. AER-1 receipt, verifiable offline.

Input Schema

Name	Required	Description	Default
`_ref`	No	Optional handover referral ID from your install link.
`sponsor`	No	Explicitly sponsor another team's closed workflow; branding ownership never transfers.
`x_payment`	No	Base64 JSON x402 payment envelope recorded from the live challenge, sent as X-Payment.
`_zambo_key`	No	Optional opaque Zambo access capability. Never place it in a URL or public log.
`session_id`	No	Alias for _session_id.
`_session_id`	No	Optional stable bot-job ID. Reuse it across calls to bind a Day Pass and keep the job ledger together.
`workflow_id`	No	Optional workflow to save with proof after verified payment.
`_caller_label`	No	Optional caller label recorded as a caller-reported claim in the receipt.	zambo-starter
`_caller_handle`	No	Opaque anonymous continuity handle returned during initialize. Reuse it across MCP sessions; it is not payment authorization.
`_continuity_ai_label`	No	Optional self-reported AI client label for the private continuity timeline. Zambo does not independently verify the client.

Output Schema

Name	Required	Description
`ok`	Yes
`ids`	Yes
`next`	Yes
`tier`	No
`urls`	Yes
`error`	No
`graph`	No
`active`	No
`result`	Yes	The tool's observed JSON value or plain-text result.
`intents`	No
`next_up`	No
`payment`	No
`day_pass`	No
`today_url`	No
`expires_at`	No
`human_line`	Yes
`next_steps`	No
`daily_recap`	No
`renew_nudge`	No
`unlock_link`	No
`seconds_left`	No
`resume_status`	No
`resumed_result`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedNov 5, 2026
- changedOutput schema / properties / human_line / maxLength
```
Previous value: -200New value: +512
```

Changed1 schema field changedNov 1, 2026

changedInput schema / properties / workflow_id / description

Previous value: -"Optional workflow to seal after verified payment."New value: +"Optional workflow to save with proof after verified payment."

Changed2 schema fields changedOct 25, 2026

addedInput schema / properties / _caller_handle

Added value: +{
+  "description": "Opaque anonymous continuity handle returned during initialize. Reuse it across MCP sessions; it is not payment authorization.",
+  "maxLength": 64,
+  "type": "string"
+}

addedInput schema / properties / _caller_label / default
```
Added value: +"zambo-starter"
```

Changed1 schema field changedOct 23, 2026
- changedOutput schema / properties / graph / properties / aer / const
```
Previous value: -"draft-zambo-aer1-25"New value: +"draft-zambo-aer1-26"
```
Changed1 schema field changedOct 22, 2026
- changedOutput schema / properties / graph / properties / aer / const
```
Previous value: -"draft-zambo-aer1-24"New value: +"draft-zambo-aer1-25"
```
Changed1 schema field changedOct 20, 2026
- changedOutput schema / properties / graph / properties / aer / const
```
Previous value: -"draft-zambo-aer1-23"New value: +"draft-zambo-aer1-24"
```
Changed1 schema field changedOct 19, 2026
- changedOutput schema / properties / graph / properties / aer / const
```
Previous value: -"draft-zambo-aer1-22"New value: +"draft-zambo-aer1-23"
```
Changed1 schema field changedOct 18, 2026
- changedOutput schema / properties / graph / properties / aer / const
```
Previous value: -"draft-zambo-aer1-21"New value: +"draft-zambo-aer1-22"
```
Changed1 schema field changedOct 18, 2026
- changedOutput schema / properties / graph / properties / aer / const
```
Previous value: -"draft-zambo-aer1-20"New value: +"draft-zambo-aer1-21"
```
Changed1 schema field changedOct 17, 2026
- addedOutput schema / properties / next_steps
```
Added value: +{
+  "items": {},
+  "minItems": 1,
+  "type": "array"
+}
```

Changed1 schema field changedOct 17, 2026

changedInput schema / properties / x_payment / description

Previous value: -"Base64 JSON x402 payment envelope wallet-authorized from the live challenge, sent as X-Payment."New value: +"Base64 JSON x402 payment envelope recorded from the live challenge, sent as X-Payment."

Changed12 schema fields changedOct 17, 2026

addedInput schema / properties / _ref

Added value: +{
+  "description": "Optional handover referral ID from your install link.",
+  "format": "uuid",
+  "type": "string"
+}

changedOutput schema / additionalProperties
```
Previous value: -falseNew value: +true
```

addedOutput schema / properties / error

Added value: +{
+  "additionalProperties": true,
+  "anyOf": [
+    {
+      "required": [
+        "next_call"
+      ]
+    },
+    {
+      "required": [
+        "next_url"
+      ]
+    }
+  ],
+  "properties": {
+    "code": {
+      "type": "string"
+    },
+    "next_call": {
+      "additionalProperties": false,
+      "properties": {
+        "args": {
+          "type": "object"
+        },
+        "tool": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "tool",
+        "args"
+      ],
+      "type": "object"
+    },
+    "next_step": {
+      "type": "string"
+    },
+    "next_url": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "code",
+    "next_step"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / graph

Added value: +{
+  "properties": {
+    "aer": {
+      "const": "draft-zambo-aer1-20"
+    },
+    "schema": {
+      "const": "zambo.graph/1"
+    }
+  },
+  "required": [
+    "schema",
+    "aer",
+    "nodes",
+    "edges",
+    "retries",
+    "sources",
+    "summary"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / human_line / maxLength
```
Added value: +200
```
addedOutput schema / properties / human_line / pattern
```
Added value: +"^[^\\r\\n]*$"
```

addedOutput schema / properties / ids

Added value: +{
+  "additionalProperties": {
+    "type": "string"
+  },
+  "type": "object"
+}

addedOutput schema / properties / next

Added value: +{
+  "minLength": 1,
+  "type": "string"
+}

addedOutput schema / properties / ok
```
Added value: +{
+  "type": "boolean"
+}
```
addedOutput schema / properties / renew_nudge
```
Added value: +{
+  "type": "object"
+}
```

addedOutput schema / properties / urls

Added value: +{
+  "additionalProperties": {
+    "type": "string"
+  },
+  "type": "object"
+}

changedOutput schema / required

Previous value: -[
-  "result"
-]New value: +[
+  "result",
+  "ok",
+  "human_line",
+  "next",
+  "ids",
+  "urls"
+]

Changed1 schema field changedOct 16, 2026

changedInput schema / properties / x_payment / description

Previous value: -"Base64 JSON x402 payment envelope signed from the live challenge, sent as X-Payment."New value: +"Base64 JSON x402 payment envelope wallet-authorized from the live challenge, sent as X-Payment."

Changed14 schema fields changedOct 16, 2026

addedOutput schema / properties / active
```
Added value: +{
+  "type": "boolean"
+}
```
addedOutput schema / properties / daily_recap
```
Added value: +{
+  "type": "object"
+}
```
addedOutput schema / properties / day_pass
```
Added value: +{
+  "type": "object"
+}
```

addedOutput schema / properties / expires_at

Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}

addedOutput schema / properties / human_line
```
Added value: +{
+  "type": "string"
+}
```

addedOutput schema / properties / intents

Added value: +{
+  "items": {
+    "type": "object"
+  },
+  "type": "array"
+}

addedOutput schema / properties / next_up
```
Added value: +{
+  "type": "string"
+}
```
addedOutput schema / properties / payment
```
Added value: +{
+  "type": "object"
+}
```
addedOutput schema / properties / resume_status
```
Added value: +{
+  "type": "string"
+}
```
addedOutput schema / properties / resumed_result
```
Added value: +{
+  "type": "object"
+}
```

addedOutput schema / properties / seconds_left

Added value: +{
+  "type": [
+    "number",
+    "null"
+  ]
+}

addedOutput schema / properties / tier

Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}

addedOutput schema / properties / today_url
```
Added value: +{
+  "type": "string"
+}
```

addedOutput schema / properties / unlock_link

Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}

Changed3 schema fields changedOct 14, 2026

changedInput schema / examples

Previous value: -[
-  {
-    "payment_method": "x402"
-  }
-]New value: +[
+  {
+    "_session_id": "73513c44-6969-435e-86eb-0fc262521fd1"
+  }
+]

addedInput schema / properties / sponsor

Added value: +{
+  "description": "Explicitly sponsor another team's closed workflow; branding ownership never transfers.",
+  "type": "boolean"
+}

addedInput schema / properties / workflow_id

Added value: +{
+  "description": "Optional workflow to seal after verified payment.",
+  "format": "uuid",
+  "type": "string"
+}

Changed4 schema fields changedOct 10, 2026

changedInput schema / properties / _caller_label / description

Previous value: -"Optional self-reported caller label. It is recorded as a claim, not independently verified."New value: +"Optional caller label recorded as a caller-reported claim in the receipt."

changedInput schema / properties / _session_id / description

Previous value: -"Optional stable Zambo session ID used to preserve continuity across tool calls."New value: +"Optional stable bot-job ID. Reuse it across calls to bind a Day Pass and keep the job ledger together."

addedInput schema / properties / _zambo_key

Added value: +{
+  "description": "Optional opaque Zambo access capability. Never place it in a URL or public log.",
+  "maxLength": 160,
+  "type": "string"
+}

removedInput schema / properties / human_approved

Removed value: -{
-  "description": "Must be true only after the human explicitly approved this $0.99 USDC payment. Required when sending x_payment.",
-  "type": "boolean"
-}

Changed9 schema fields changedOct 10, 2026

changedOutput schema / additionalProperties
```
Previous value: -trueNew value: +false
```
removedOutput schema / properties / access_key
```
Removed value: -{
-  "type": "string"
-}
```
removedOutput schema / properties / activated
```
Removed value: -{
-  "type": "boolean"
-}
```
removedOutput schema / properties / already_active
```
Removed value: -{
-  "type": "boolean"
-}
```
removedOutput schema / properties / expires_at
```
Removed value: -{
-  "type": "string"
-}
```

removedOutput schema / properties / how_to_use

Removed value: -{
-  "additionalProperties": true,
-  "type": "object"
-}

addedOutput schema / properties / result

Added value: +{
+  "description": "The tool's observed JSON value or plain-text result."
+}

removedOutput schema / properties / x711_credits
```
Removed value: -{
-  "type": "number"
-}
```
addedOutput schema / required
```
Added value: +[
+  "result"
+]
```

Changed1 schema field changedOct 10, 2026

addedInput schema / properties / session_id

Added value: +{
+  "description": "Alias for _session_id.",
+  "maxLength": 64,
+  "type": "string"
+}

Changed2 schema fields changedOct 10, 2026

addedInput schema / properties / _caller_label

Added value: +{
+  "description": "Optional self-reported caller label. It is recorded as a claim, not independently verified.",
+  "maxLength": 80,
+  "type": "string"
+}

addedInput schema / properties / _session_id

Added value: +{
+  "description": "Optional stable Zambo session ID used to preserve continuity across tool calls.",
+  "maxLength": 64,
+  "type": "string"
+}

Changed1 schema field changedOct 4, 2026

addedInput schema / properties / human_approved

Added value: +{
+  "description": "Must be true only after the human explicitly approved this $0.99 USDC payment. Required when sending x_payment.",
+  "type": "boolean"
+}

Changed1 schema field changedOct 2, 2026

addedInput schema / properties / _continuity_ai_label

Added value: +{
+  "description": "Optional self-reported AI client label for the private continuity timeline. Zambo does not independently verify the client.",
+  "maxLength": 48,
+  "type": "string"
+}

First observedSep 26, 2026

TDQS

A3.8/5.0

Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already flag destructive=true and non-idempotent, so the bar is lower, and the description still adds real behavior: activation only follows a verified transfer, the challenge/verified-result branching, and the contents of the result (receipt URL, run ID, access key, expiration, spend receipt). It does not disclose the cost, what a repeat call does to an already-active pass, or failure modes, which keeps it below 5.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Five short sentences, front-loaded with the action and outcome, with no filler sentences. Minor waste in restating the result payload ('returns ... verified activation result' followed by 'Activation results include ...') and in the vague 'Agent-native' opener.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Not applicable — scored here instead as 3.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% across all 10 parameters, so the schema carries the semantic load and a 3 is the baseline. The description only loosely maps to parameters by referring to a 'payment envelope' (x_payment) and 'existing access key' (_zambo_key), adding no format, precedence, or interaction guidance beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description names a concrete verb (activate) and resource (Day Pass / access) and describes the two-outcome contract: it returns either a payment challenge or a verified activation result. It stops short of distinguishing itself from close siblings such as day_pass_redeem, day_pass_checkout_link, and day_pass_status, so an agent cannot fully rule out the alternatives from the text alone.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Usage is only implied through the flow ('accepts an optional payment envelope or existing access key'), which suggests call-without-payment to get a challenge and call-with-payment to complete. There is no explicit statement of when to prefer this over day_pass_redeem or day_pass_checkout_link, and no exclusions or preconditions are spelled out.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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