Pay x402 resources on U.CASH from your own wallet: view the price, pay on-chain, settle by hash.
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Cancel a UCP checkout session. No key; pass cloud for a hosted merchant.
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Cancel a UCP checkout session. No key; pass cloud for a hosted merchant.
| Argument | Type | Description |
|---|---|---|
| id* | string | |
| cloud | string |
{
"type": "object",
"required": [
"id"
],
"properties": {
"id": {
"type": "string"
},
"cloud": {
"type": "string"
}
}
}Mint payment challenges for a checkout session -> ready_for_complete. Optional ap2 (AP2 checkout mandate). No key; pass cloud for a hosted merchant.
| Argument | Type | Description |
|---|---|---|
| id* | string | |
| ap2 | string | optional AP2 checkout mandate |
| cloud | string |
{
"type": "object",
"required": [
"id"
],
"properties": {
"id": {
"type": "string"
},
"ap2": {
"type": "string",
"description": "optional AP2 checkout mandate"
},
"cloud": {
"type": "string"
}
}
}Create a UCP checkout session (multi-item, mixed-currency cart) for a merchant catalog. No key. Returns {id, status, currency, line_items, totals, ap2}.
| Argument | Type | Description |
|---|---|---|
| buyer | string | |
| cloud | string | merchant token when buying from a hosted merchant |
| context | string | |
| currency | string | optional cart display currency |
| line_items* | array | each: {item:{id}, quantity} |
{
"type": "object",
"required": [
"line_items"
],
"properties": {
"buyer": {
"type": "string"
},
"cloud": {
"type": "string",
"description": "merchant token when buying from a hosted merchant"
},
"context": {
"type": "string"
},
"currency": {
"type": "string",
"description": "optional cart display currency"
},
"line_items": {
"type": "array",
"description": "each: {item:{id}, quantity}"
}
}
}List every u.cash MCP server in the fleet (buyer, seller, prime, legacy): product surface, auth model, transports with install coordinates, docs URL. Optional q filters by name/product/summary. Discovery only - connect to each server directly with your own credentials; no call is ever proxied.
| Argument | Type | Description |
|---|---|---|
| q | string | case-insensitive substring over name/product/summary |
{
"type": "object",
"properties": {
"q": {
"type": "string",
"description": "case-insensitive substring over name/product/summary"
}
}
}Search tools across every u.cash MCP server by name or description (case-insensitive substring), optionally scoped to one server. Returns the tool, a one-liner, its server, and how to connect. Discovery only - connect to that server directly; no call is ever proxied.
| Argument | Type | Description |
|---|---|---|
| q | string | substring matched over tool name + description |
| limit | integer | |
| server | string | optional: restrict to one fleet server name |
{
"type": "object",
"properties": {
"q": {
"type": "string",
"description": "substring matched over tool name + description"
},
"limit": {
"type": "integer",
"default": 20,
"maximum": 50,
"minimum": 1
},
"server": {
"type": "string",
"description": "optional: restrict to one fleet server name"
}
}
}Fetch a UCP checkout session by id (status: incomplete -> ready_for_complete -> completed). No key; pass cloud for a hosted merchant.
| Argument | Type | Description |
|---|---|---|
| id* | string | |
| cloud | string |
{
"type": "object",
"required": [
"id"
],
"properties": {
"id": {
"type": "string"
},
"cloud": {
"type": "string"
}
}
}The PUBLIC cross-merchant market catalog: every published checkout across merchants (id, title, price, currency, merchant, domain, payable url). No key. q filters by title/merchant/description.
| Argument | Type | Description |
|---|---|---|
| q | string | filter by title/merchant/description |
| limit | integer | |
| fields | array | Optional response projection: dot paths to keep, e.g. ["items.title","items.price"] or row-level ["title","price"]. Envelope/meta keys (ok, success, total, count, pagination) are always kept; unknown paths are ignored; empty/absent = full response. |
{
"type": "object",
"properties": {
"q": {
"type": "string",
"description": "filter by title/merchant/description"
},
"limit": {
"type": "integer",
"default": 50,
"maximum": 200
},
"fields": {
"type": "array",
"items": {
"type": "string"
},
"maxItems": 20,
"description": "Optional response projection: dot paths to keep, e.g. [\"items.title\",\"items.price\"] or row-level [\"title\",\"price\"]. Envelope/meta keys (ok, success, total, count, pagination) are always kept; unknown paths are ignored; empty/absent = full response."
}
}
}View a UCP checkout session as an order (per-item fulfillment status + fulfillment events). No key; pass cloud for a hosted merchant.
| Argument | Type | Description |
|---|---|---|
| id* | string | |
| cloud | string |
{
"type": "object",
"required": [
"id"
],
"properties": {
"id": {
"type": "string"
},
"cloud": {
"type": "string"
}
}
}Fetch a single catalog product by id. Public (no key); pair with uxc_search_catalog to find ids.
| Argument | Type | Description |
|---|---|---|
| id* | string | |
| cloud | string |
{
"type": "object",
"required": [
"id"
],
"properties": {
"id": {
"type": "string"
},
"cloud": {
"type": "string"
}
}
}The PUBLIC cross-provider services catalog (eSend rail: each row carries the provider contact email, a sendable asset code and a price). No key.
| Argument | Type | Description |
|---|---|---|
| limit | integer | |
| fields | array | Optional response projection: dot paths to keep, e.g. ["items.asset","items.price"] or row-level ["asset","price"]. Envelope/meta keys (ok, success, total, count, pagination) are always kept; unknown paths are ignored; empty/absent = full response. |
{
"type": "object",
"properties": {
"limit": {
"type": "integer",
"default": 50,
"maximum": 200
},
"fields": {
"type": "array",
"items": {
"type": "string"
},
"maxItems": 20,
"description": "Optional response projection: dot paths to keep, e.g. [\"items.asset\",\"items.price\"] or row-level [\"asset\",\"price\"]. Envelope/meta keys (ok, success, total, count, pagination) are always kept; unknown paths are ignored; empty/absent = full response."
}
}
}Batch catalog lookup by ids. Public (no key).
| Argument | Type | Description |
|---|---|---|
| ids* | array | |
| cloud | string | |
| fields | array | Optional response projection: dot paths to keep, e.g. row-level ["id","title","price"]. Envelope/meta keys (ok, success, total, count, pagination) are always kept; unknown paths are ignored; empty/absent = full response. |
{
"type": "object",
"required": [
"ids"
],
"properties": {
"ids": {
"type": "array",
"items": {
"type": "string"
}
},
"cloud": {
"type": "string"
},
"fields": {
"type": "array",
"items": {
"type": "string"
},
"maxItems": 20,
"description": "Optional response projection: dot paths to keep, e.g. row-level [\"id\",\"title\",\"price\"]. Envelope/meta keys (ok, success, total, count, pagination) are always kept; unknown paths are ignored; empty/absent = full response."
}
}
}Search a merchant catalog (text query + price filters + pagination). The merchant is resolved from a cloud token (the "cloud" argument) or the platform default. No key.
| Argument | Type | Description |
|---|---|---|
| cloud | string | |
| query | string | |
| filters | string | |
| pagination | string |
{
"type": "object",
"properties": {
"cloud": {
"type": "string"
},
"query": {
"type": "string"
},
"filters": {
"type": "string"
},
"pagination": {
"type": "string"
}
}
}BUYER-SIDE. After paying a resource (from uxc_view_door) on-chain from your own wallet, submit the transaction hash to settle it. Pass the challengeId from the accepts[] entry you paid and the on-chain transaction hash. Returns settled (confirmed) or pending (awaiting confirmations). No seller key needed - the challengeId identifies the resource, and settlement is gated by on-chain confirmation.
| Argument | Type | Description |
|---|---|---|
| hash* | string | |
| challengeId* | string |
{
"type": "object",
"required": [
"challengeId",
"hash"
],
"properties": {
"hash": {
"type": "string"
},
"challengeId": {
"type": "string"
}
}
}Fetch the public 402 payment door for a resource (what a buyer sees at https://agents.u.cash/r/{res_id}): the price + the multi-coin accepts[] (each asset, the seller receive address, and the exact amount to pay). No key. Use as a BUYER to see what to pay, then uxc_verify_payment after paying. status=true polls settlement without minting a new challenge.
| Argument | Type | Description |
|---|---|---|
| res_id* | string | |
| status | boolean | poll mode: GET /r/{id}?status=1 - no-mint settlement check |
{
"type": "object",
"required": [
"res_id"
],
"properties": {
"res_id": {
"type": "string"
},
"status": {
"type": "boolean",
"description": "poll mode: GET /r/{id}?status=1 - no-mint settlement check"
}
}
}