Agent Hub - AI-operated public sandbox: demo data, simulated payments, no real bookings

Server Details

Agent-to-business commerce sandbox: intents, offers, bookings. Demo data, ed25519-signed calls.

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Status: Unhealthy
Uptime: 25.9% over 60 days
Last Tested: 2026-10-17 06:11
Transport: Streamable HTTP
URL

TDQS

A4.6/5.0

Scored 2026-09-09 18:26 across 6 tools

Disambiguation5/5

Each tool maps to a distinct step in the buy flow: register_agent, send_intent, list_offers, hold_slot, confirm_booking, and approve_pending as the seller-side approval branch. The only close pair, confirm_booking and approve_pending, is sharply separated by reachability, payload, and side effects. No two tools can plausibly be confused.

Naming Consistency5/5

All six tools follow a consistent verb_noun snake_case pattern: register_agent, send_intent, list_offers, hold_slot, confirm_booking, approve_pending. The verb consistently precedes the object, and no mixed conventions or vague names appear. An agent can predict the tool name from the action it wants to perform.

Tool Count5/5

Six tools is well-scoped for a sandbox buy-flow hub: registration, intent creation, offer listing, slot holding, booking confirmation, and the approval edge case. Each tool has a distinct role and none feels redundant or like filler. This sits comfortably in the ideal range.

Completeness4/5

The core buyer-facing lifecycle is complete: register → send intent → list offers → hold slot → confirm booking, with approve_pending covering the documented approval branch. However, there is no way to read back a hold or booking, no cancellation or refund path, and the seller-side approval tool is unreachable for self-registered agents. These are notable but non-blocking gaps for a demo sandbox.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

6 tool updatesAug 30, 2026

Changedapprove_pending1 field changed

changedInput schema / properties / signature / description

Previous value: -"Hex-encoded ed25519 signature over the RFC 8785 (JCS) canonical JSON of exactly {payload, agent_id, nonce, timestamp} — the whole envelope minus this field. Sign with the private key matching the public_key you registered. Worked example: https://hub.videtion.com/spec"New value: +"Hex-encoded ed25519 signature over the RFC 8785 (JCS) canonical JSON of exactly {payload, agent_id, nonce, timestamp} — the whole envelope minus this field. Sign with the private key matching the public_key you registered. Worked example, and where it actually is: https://hub.videtion.com/quickstart.mjs — 6941 bytes, zero dependencies, Node 20+, which mints an ed25519 key, canonicalises exactly these four fields and signs them, so you can diff your bytes against a call this hub accepts. https://hub.videtion.com/spec states the same rule in prose and field tables and publishes no signature to copy: it is the reference, not the example."

Changedconfirm_booking1 field changed

changedInput schema / properties / signature / description

Previous value: -"Hex-encoded ed25519 signature over the RFC 8785 (JCS) canonical JSON of exactly {payload, agent_id, nonce, timestamp} — the whole envelope minus this field. Sign with the private key matching the public_key you registered. Worked example: https://hub.videtion.com/spec"New value: +"Hex-encoded ed25519 signature over the RFC 8785 (JCS) canonical JSON of exactly {payload, agent_id, nonce, timestamp} — the whole envelope minus this field. Sign with the private key matching the public_key you registered. Worked example, and where it actually is: https://hub.videtion.com/quickstart.mjs — 6941 bytes, zero dependencies, Node 20+, which mints an ed25519 key, canonicalises exactly these four fields and signs them, so you can diff your bytes against a call this hub accepts. https://hub.videtion.com/spec states the same rule in prose and field tables and publishes no signature to copy: it is the reference, not the example."

Changedhold_slot1 field changed

changedInput schema / properties / signature / description

Previous value: -"Hex-encoded ed25519 signature over the RFC 8785 (JCS) canonical JSON of exactly {payload, agent_id, nonce, timestamp} — the whole envelope minus this field. Sign with the private key matching the public_key you registered. Worked example: https://hub.videtion.com/spec"New value: +"Hex-encoded ed25519 signature over the RFC 8785 (JCS) canonical JSON of exactly {payload, agent_id, nonce, timestamp} — the whole envelope minus this field. Sign with the private key matching the public_key you registered. Worked example, and where it actually is: https://hub.videtion.com/quickstart.mjs — 6941 bytes, zero dependencies, Node 20+, which mints an ed25519 key, canonicalises exactly these four fields and signs them, so you can diff your bytes against a call this hub accepts. https://hub.videtion.com/spec states the same rule in prose and field tables and publishes no signature to copy: it is the reference, not the example."

Changedlist_offers1 field changed

changedInput schema / properties / signature / description

Previous value: -"Hex-encoded ed25519 signature over the RFC 8785 (JCS) canonical JSON of exactly {payload, agent_id, nonce, timestamp} — the whole envelope minus this field. Sign with the private key matching the public_key you registered. Worked example: https://hub.videtion.com/spec"New value: +"Hex-encoded ed25519 signature over the RFC 8785 (JCS) canonical JSON of exactly {payload, agent_id, nonce, timestamp} — the whole envelope minus this field. Sign with the private key matching the public_key you registered. Worked example, and where it actually is: https://hub.videtion.com/quickstart.mjs — 6941 bytes, zero dependencies, Node 20+, which mints an ed25519 key, canonicalises exactly these four fields and signs them, so you can diff your bytes against a call this hub accepts. https://hub.videtion.com/spec states the same rule in prose and field tables and publishes no signature to copy: it is the reference, not the example."

Changedregister_agent1 field changed

changedInput schema / properties / signature / description

Previous value: -"Hex-encoded ed25519 signature over the RFC 8785 (JCS) canonical JSON of exactly {payload, agent_id, nonce, timestamp} — the whole envelope minus this field. Sign with the private key matching the public_key you registered. Worked example: https://hub.videtion.com/spec"New value: +"Hex-encoded ed25519 signature over the RFC 8785 (JCS) canonical JSON of exactly {payload, agent_id, nonce, timestamp} — the whole envelope minus this field. Sign with the private key matching the public_key you registered. Worked example, and where it actually is: https://hub.videtion.com/quickstart.mjs — 6941 bytes, zero dependencies, Node 20+, which mints an ed25519 key, canonicalises exactly these four fields and signs them, so you can diff your bytes against a call this hub accepts. https://hub.videtion.com/spec states the same rule in prose and field tables and publishes no signature to copy: it is the reference, not the example."

Changedsend_intent1 field changed

changedInput schema / properties / signature / description

Previous value: -"Hex-encoded ed25519 signature over the RFC 8785 (JCS) canonical JSON of exactly {payload, agent_id, nonce, timestamp} — the whole envelope minus this field. Sign with the private key matching the public_key you registered. Worked example: https://hub.videtion.com/spec"New value: +"Hex-encoded ed25519 signature over the RFC 8785 (JCS) canonical JSON of exactly {payload, agent_id, nonce, timestamp} — the whole envelope minus this field. Sign with the private key matching the public_key you registered. Worked example, and where it actually is: https://hub.videtion.com/quickstart.mjs — 6941 bytes, zero dependencies, Node 20+, which mints an ed25519 key, canonicalises exactly these four fields and signs them, so you can diff your bytes against a call this hub accepts. https://hub.videtion.com/spec states the same rule in prose and field tables and publishes no signature to copy: it is the reference, not the example."

1 tool updateAug 25, 2026

Changedsend_intent1 field changed

changedInput schema / properties / payload / properties / product / description

Previous value: -"Free-form product spec, e.g. { width: 225, profile: 45, diameter: 18, season: \"winter\", quantity: 4 }."New value: +"Free-form product spec. Sellers match on product.size, ONE string — a split width/profile/diameter is not read and returns zero offers, and the count key is qty, not quantity. Shape the demo inventory answers: {\"size\":\"225/45 R18\",\"season\":\"winter\",\"qty\":4}"

6 tool updatesAug 21, 2026

Changedapprove_pending13 fields changed

addedInput schema / properties / agent_id / maxLength
```
Added value: +128
```
addedInput schema / properties / agent_id / minLength
```
Added value: +1
```
addedInput schema / properties / nonce / maxLength
```
Added value: +256
```
addedInput schema / properties / nonce / minLength
```
Added value: +1
```
addedInput schema / properties / payload / additionalProperties
```
Added value: +true
```

changedInput schema / properties / payload / description

Previous value: -"Tool-specific arguments — see this tool's description for the exact shape. Covered by the signature."New value: +"Covered by the signature."

addedInput schema / properties / payload / properties

Added value: +{
+  "approval_id": {
+    "description": "The approval_id returned by confirm_booking.",
+    "format": "uuid",
+    "type": "string"
+  }
+}

addedInput schema / properties / payload / required
```
Added value: +[
+  "approval_id"
+]
```
addedInput schema / properties / payload / type
```
Added value: +"object"
```
addedInput schema / properties / signature / maxLength
```
Added value: +512
```
addedInput schema / properties / signature / minLength
```
Added value: +1
```
changedInput schema / properties / timestamp / type
```
Previous value: -"number"New value: +"integer"
```

changedInput schema / required

Previous value: -[
-  "agent_id",
-  "nonce",
-  "timestamp",
-  "signature"
-]New value: +[
+  "payload",
+  "agent_id",
+  "nonce",
+  "timestamp",
+  "signature"
+]

Changedconfirm_booking13 fields changed

addedInput schema / properties / agent_id / maxLength
```
Added value: +128
```
addedInput schema / properties / agent_id / minLength
```
Added value: +1
```
addedInput schema / properties / nonce / maxLength
```
Added value: +256
```
addedInput schema / properties / nonce / minLength
```
Added value: +1
```
addedInput schema / properties / payload / additionalProperties
```
Added value: +true
```

changedInput schema / properties / payload / description

Previous value: -"Tool-specific arguments — see this tool's description for the exact shape. Covered by the signature."New value: +"Covered by the signature."

addedInput schema / properties / payload / properties

Added value: +{
+  "hold_id": {
+    "description": "The hold_id returned by hold_slot.",
+    "format": "uuid",
+    "type": "string"
+  }
+}

addedInput schema / properties / payload / required
```
Added value: +[
+  "hold_id"
+]
```
addedInput schema / properties / payload / type
```
Added value: +"object"
```
addedInput schema / properties / signature / maxLength
```
Added value: +512
```
addedInput schema / properties / signature / minLength
```
Added value: +1
```
changedInput schema / properties / timestamp / type
```
Previous value: -"number"New value: +"integer"
```

changedInput schema / required

Previous value: -[
-  "agent_id",
-  "nonce",
-  "timestamp",
-  "signature"
-]New value: +[
+  "payload",
+  "agent_id",
+  "nonce",
+  "timestamp",
+  "signature"
+]

Changedhold_slot13 fields changed

addedInput schema / properties / agent_id / maxLength
```
Added value: +128
```
addedInput schema / properties / agent_id / minLength
```
Added value: +1
```
addedInput schema / properties / nonce / maxLength
```
Added value: +256
```
addedInput schema / properties / nonce / minLength
```
Added value: +1
```
addedInput schema / properties / payload / additionalProperties
```
Added value: +true
```

changedInput schema / properties / payload / description

Previous value: -"Tool-specific arguments — see this tool's description for the exact shape. Covered by the signature."New value: +"Covered by the signature."

addedInput schema / properties / payload / properties

Added value: +{
+  "offer_id": {
+    "description": "The offer_id returned by list_offers.",
+    "format": "uuid",
+    "type": "string"
+  }
+}

addedInput schema / properties / payload / required
```
Added value: +[
+  "offer_id"
+]
```
addedInput schema / properties / payload / type
```
Added value: +"object"
```
addedInput schema / properties / signature / maxLength
```
Added value: +512
```
addedInput schema / properties / signature / minLength
```
Added value: +1
```
changedInput schema / properties / timestamp / type
```
Previous value: -"number"New value: +"integer"
```

changedInput schema / required

Previous value: -[
-  "agent_id",
-  "nonce",
-  "timestamp",
-  "signature"
-]New value: +[
+  "payload",
+  "agent_id",
+  "nonce",
+  "timestamp",
+  "signature"
+]

Changedlist_offers13 fields changed

addedInput schema / properties / agent_id / maxLength
```
Added value: +128
```
addedInput schema / properties / agent_id / minLength
```
Added value: +1
```
addedInput schema / properties / nonce / maxLength
```
Added value: +256
```
addedInput schema / properties / nonce / minLength
```
Added value: +1
```
addedInput schema / properties / payload / additionalProperties
```
Added value: +true
```

changedInput schema / properties / payload / description

Previous value: -"Tool-specific arguments — see this tool's description for the exact shape. Covered by the signature."New value: +"Covered by the signature."

addedInput schema / properties / payload / properties

Added value: +{
+  "intent_id": {
+    "description": "The intent_id returned by send_intent.",
+    "minLength": 1,
+    "type": "string"
+  }
+}

addedInput schema / properties / payload / required
```
Added value: +[
+  "intent_id"
+]
```
addedInput schema / properties / payload / type
```
Added value: +"object"
```
addedInput schema / properties / signature / maxLength
```
Added value: +512
```
addedInput schema / properties / signature / minLength
```
Added value: +1
```
changedInput schema / properties / timestamp / type
```
Previous value: -"number"New value: +"integer"
```

changedInput schema / required

Previous value: -[
-  "agent_id",
-  "nonce",
-  "timestamp",
-  "signature"
-]New value: +[
+  "payload",
+  "agent_id",
+  "nonce",
+  "timestamp",
+  "signature"
+]

Changedregister_agent13 fields changed

addedInput schema / properties / agent_id / maxLength
```
Added value: +128
```
addedInput schema / properties / agent_id / minLength
```
Added value: +1
```
addedInput schema / properties / nonce / maxLength
```
Added value: +256
```
addedInput schema / properties / nonce / minLength
```
Added value: +1
```
addedInput schema / properties / payload / additionalProperties
```
Added value: +true
```

changedInput schema / properties / payload / description

Previous value: -"Tool-specific arguments — see this tool's description for the exact shape. Covered by the signature."New value: +"Registration payload. Covered by the signature."

addedInput schema / properties / payload / properties

Added value: +{
+  "principal": {
+    "additionalProperties": true,
+    "description": "Who the agent acts for. Optional.",
+    "properties": {
+      "name": {
+        "description": "Free-text label for your agent, shown in the sandbox.",
+        "maxLength": 200,
+        "type": "string"
+      },
+      "type": {
+        "description": "Use \"user\". \"business\" is accepted by the schema and then refused with 403 — seller passports are operator-issued.",
+        "enum": [
+          "business",
+          "user"
+        ],
+        "type": "string"
+      }
+    },
+    "type": "object"
+  },
+  "public_key": {
+    "description": "Your ed25519 PUBLIC key, 64 hex chars. The envelope signature is verified against THIS key — that is the registration: no password, no invite, no API key, and no way to register a key you cannot sign with.",
+    "maxLength": 128,
+    "minLength": 1,
+    "type": "string"
+  }
+}

addedInput schema / properties / payload / required
```
Added value: +[
+  "public_key"
+]
```
addedInput schema / properties / payload / type
```
Added value: +"object"
```
addedInput schema / properties / signature / maxLength
```
Added value: +512
```
addedInput schema / properties / signature / minLength
```
Added value: +1
```
changedInput schema / properties / timestamp / type
```
Previous value: -"number"New value: +"integer"
```

changedInput schema / required

Previous value: -[
-  "agent_id",
-  "nonce",
-  "timestamp",
-  "signature"
-]New value: +[
+  "payload",
+  "agent_id",
+  "nonce",
+  "timestamp",
+  "signature"
+]

Changedsend_intent13 fields changed

addedInput schema / properties / agent_id / maxLength
```
Added value: +128
```
addedInput schema / properties / agent_id / minLength
```
Added value: +1
```
addedInput schema / properties / nonce / maxLength
```
Added value: +256
```
addedInput schema / properties / nonce / minLength
```
Added value: +1
```
addedInput schema / properties / payload / additionalProperties
```
Added value: +true
```

changedInput schema / properties / payload / description

Previous value: -"Tool-specific arguments — see this tool's description for the exact shape. Covered by the signature."New value: +"A structured Intent. Covered by the signature."

addedInput schema / properties / payload / properties

Added value: +{
+  "availability": {
+    "additionalProperties": true,
+    "properties": {
+      "after_time": {
+        "maxLength": 64,
+        "type": "string"
+      },
+      "before": {
+        "maxLength": 64,
+        "type": "string"
+      }
+    },
+    "type": "object"
+  },
+  "budget": {
+    "additionalProperties": true,
+    "properties": {
+      "currency": {
+        "description": "3-letter code, e.g. \"PLN\".",
+        "maxLength": 3,
+        "minLength": 3,
+        "type": "string"
+      },
+      "max": {
+        "exclusiveMinimum": 0,
+        "type": "number"
+      }
+    },
+    "required": [
+      "currency",
+      "max"
+    ],
+    "type": "object"
+  },
+  "location": {
+    "description": "Where. The demo inventory answers \"Wroclaw\".",
+    "maxLength": 200,
+    "minLength": 1,
+    "type": "string"
+  },
+  "product": {
+    "additionalProperties": {},
+    "description": "Free-form product spec, e.g. { width: 225, profile: 45, diameter: 18, season: \"winter\", quantity: 4 }.",
+    "type": "object"
+  },
+  "service": {
+    "description": "e.g. \"installation\".",
+    "maxLength": 200,
+    "type": "string"
+  },
+  "type": {
+    "description": "What you want. The demo inventory answers \"car_tires\".",
+    "maxLength": 200,
+    "minLength": 1,
+    "type": "string"
+  }
+}

addedInput schema / properties / payload / required
```
Added value: +[
+  "type",
+  "location"
+]
```
addedInput schema / properties / payload / type
```
Added value: +"object"
```
addedInput schema / properties / signature / maxLength
```
Added value: +512
```
addedInput schema / properties / signature / minLength
```
Added value: +1
```
changedInput schema / properties / timestamp / type
```
Previous value: -"number"New value: +"integer"
```

changedInput schema / required

Previous value: -[
-  "agent_id",
-  "nonce",
-  "timestamp",
-  "signature"
-]New value: +[
+  "payload",
+  "agent_id",
+  "nonce",
+  "timestamp",
+  "signature"
+]

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