Mempool
Litecoin mempool summary
get_mempool · Mempool · 1 credit
Use this when the user asks about current unconfirmed transactions or mempool congestion. Mempool summary (count, size, fees). 1 credit. Includes: transactions (+2, up to 50 entries, each with its node receipt time received_at), next_block (+2 — a real next-block candidate estimate from the node's own block template: tx count, fee sum, transparent vsize, as-of time; explicit unavailable object when no fresh template can be produced). Served live from the node (may briefly 502 if the node is unavailable). For broad network pulse / network health questions, combine with get_chain_home (tip + validation), get_charts_network (activity trends), and get_mempool_feerates (fee-rate estimates).
Page Sections
Request
Send a tools/call request to the MCP endpoint /xtract/mcp:
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "get_mempool",
"arguments": {
"chain": "litecoin"
}
}
}Parameters
| Name | Type | Required | Description |
|---|---|---|---|
chain | string — one of: litecoin | yes | Blockchain network. Currently litecoin. |
include | array of string — one of: next_block, transactions | no | Optional expansions. Each expansion adds credits. |
Full input schema
{
"additionalProperties": false,
"properties": {
"chain": {
"description": "Blockchain network. Currently `litecoin`.",
"enum": [
"litecoin"
],
"type": "string"
},
"include": {
"description": "Optional expansions. Each expansion adds credits.",
"items": {
"enum": [
"next_block",
"transactions"
],
"type": "string"
},
"maxItems": 32,
"type": "array",
"x-include-costs": {
"next_block": 2,
"transactions": 2
}
}
},
"required": [
"chain"
],
"type": "object"
}Response
The outputSchema is the CLOSED model contract for structuredContent (top-level additionalProperties: false), answer-first fixed key order: source, tool, endpoint, request (echoed arguments), answer (authoritative result summary — answer from this and data), data (the complete result), included/included_digest (full expansion rows + a compact digest, when paid include expansions were served), units, answerable_fields, warnings, citations (complete visible citation array), usage (per-call cost truth), validation, and pagination (cursor/has_more/effective_limit/requested_limit). The single content block is a short plain-text answer card mirroring the same facts (header, Answer, Units, Warnings, Usage, Source). Errors return a plain-text error card and attach NO structuredContent. See How to cite ForceX MCP results.
Full output schema
{
"additionalProperties": false,
"description": "Answer-first model contract: source, tool, endpoint, request, answer, data, included?, included_digest?, units, answerable_fields, warnings, citations, usage, validation, pagination?. Errors attach NO structuredContent (plain-text error card in content).",
"properties": {
"answer": {
"description": "Authoritative result summary — answer from this and `data`.",
"type": "string"
},
"answerable_fields": {
"items": {
"type": "string"
},
"type": "array"
},
"citations": {
"items": {
"additionalProperties": true,
"description": "Visible citation (optional keys null-elided).",
"properties": {
"docs_url": {
"type": "string"
},
"endpoint": {
"type": "string"
},
"source": {
"type": "string"
},
"title": {
"type": "string"
},
"tool": {
"type": "string"
},
"url": {
"type": "string"
}
},
"required": [
"source",
"tool",
"endpoint",
"docs_url"
],
"type": "object"
},
"type": "array"
},
"data": {
"additionalProperties": true,
"properties": {
"bytes": {
"type": "integer"
},
"fee_histogram": {
"additionalProperties": true,
"properties": {},
"type": "object"
},
"size": {
"type": "integer"
}
},
"type": "object"
},
"endpoint": {
"type": "string"
},
"included": {
"type": [
"object",
"null"
]
},
"included_digest": {
"description": "Compact per-expansion digest (counts/truncation/sums); full rows stay in `included`.",
"type": "object"
},
"pagination": {
"type": [
"object",
"null"
]
},
"request": {
"type": "object"
},
"source": {
"type": "string"
},
"tool": {
"type": "string"
},
"units": {
"type": "object"
},
"usage": {
"additionalProperties": true,
"description": "Per-call cost truth; cost_note only when the charge exceeds the Free cap.",
"properties": {
"base_credit_cost": {
"type": "integer"
},
"credit_cost": {
"type": [
"integer",
"null"
]
},
"include_credit_costs": {
"type": "object"
},
"rate_limit": {
"type": [
"object",
"null"
]
}
},
"required": [
"credit_cost",
"base_credit_cost",
"include_credit_costs"
],
"type": "object"
},
"validation": {
"additionalProperties": false,
"description": "Validation state; not_applicable_reason when not chain-scope.",
"properties": {
"lag_blocks": {
"type": [
"integer",
"null"
]
},
"not_applicable_reason": {
"type": "string"
},
"scope": {
"type": [
"string",
"null"
]
},
"status": {
"type": [
"string",
"null"
]
},
"validated_at": {
"type": [
"string",
"null"
]
},
"validated_height": {
"type": [
"integer",
"null"
]
}
},
"required": [
"status"
],
"type": "object"
},
"warnings": {
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"source",
"tool",
"endpoint",
"request",
"answer",
"data",
"units",
"answerable_fields",
"warnings",
"citations",
"usage",
"validation"
],
"title": "Litecoin mempool summary result",
"type": "object"
}Notes
- Cost: 1 credit. Costs and tier limits match the wrapped Xtract REST endpoint — see
get_developer_limits. - Wrapped REST endpoint: /xtract/docs/reference/mempool/ — the full parameter, response, and methodology reference.
- Data-retrieval tool: it never creates blockchain transactions, signs messages, publishes content, or changes third-party state (
openWorldHint=false,destructiveHint=false). Successful calls consume Xtract credits and record usage on your ForceX account, soreadOnlyHint=false.