io.github.chrischall/splitwise-mcp
NPM · SPLITWISE-MCP · SCANNED SEP 20
Splitwise expense and group management for Claude — shared expenses, settle up, friends
Available components
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security100
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 0 of 6 dependencies flagged as unhealthy. View diagnostics → Pass
Provenance & Transparency97
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to chrischall/splitwise-mcp). View diagnostics → Pass
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 0 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability79
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 3056 tokens (~113/item across 27 items; 27 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management97
- Stability observed for 29 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage95
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 84% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- All 5 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.Pass
- An AI judge read all 27 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the io.github.chrischall/splitwise-mcp server?
io.github.chrischall/splitwise-mcp runs locally as an npm package, launched with npx -y splitwise-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · splitwise-mcp
claude mcp add chrischall-splitwise-mcp -- npx -y splitwise-mcp
{
"mcpServers": {
"chrischall-splitwise-mcp": {
"command": "npx",
"args": [
"-y",
"splitwise-mcp"
]
}
}
} {
"servers": {
"chrischall-splitwise-mcp": {
"command": "npx",
"args": [
"-y",
"splitwise-mcp"
]
}
}
} codex mcp add chrischall-splitwise-mcp -- npx -y splitwise-mcp
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"chrischall-splitwise-mcp": {
"type": "local",
"command": [
"npx",
"-y",
"splitwise-mcp"
],
"enabled": true
}
}
} openclaw mcp add chrischall-splitwise-mcp --command npx --arg -y --arg splitwise-mcp
mcp_servers:
chrischall-splitwise-mcp:
command: "npx"
args: ["-y", "splitwise-mcp"] {
"McpServers": {
"chrischall-splitwise-mcp": {
"Transport": "stdio",
"Command": "npx",
"Arguments": [
"-y",
"splitwise-mcp"
]
}
}
} assistant mcp add chrischall-splitwise-mcp -t stdio -c npx -a -y splitwise-mcp
{
"mcpServers": {
"chrischall-splitwise-mcp": {
"command": "npx",
"args": [
"-y",
"splitwise-mcp"
]
}
}
} Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 20 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.
- 18 Sept 26 +1
- Stability: 0.87 → unverified ▼ security
- Tool safety: pass → unverified ▼ security
- Capabilities: pass → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- Dependency health: 0.86 → 1.00 ▲ functional
- Schema quality: Schema quality not yet verified: we do not have a sandbox capture of the MCP schema this version of the package serves yet. functional
- Package version: 2.4.2 → 3.0.0 functional
- 17 Sept 26 −2
- Stability: pass → 0.87 functional
- 16 Sept 26 +1
- Stability: 0.97 → pass security
- 14 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.
- 12 Sept 26 +16
- Malware scan: unverified → pass ▲ security
- 10 Sept 26 −14
- Malware scan: pass → unverified ▼ security
- Package version: 2.4.1 → 2.4.2 functional
- 9 Sept 26 −4
- Security disclosure: unverified → fail ▼ functional
- Stability: pass → 0.77 functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 20 Sept 2026 · Analysed npm/splitwise-mcp@3.0.0
Provenance Verified
A signed build attestation was found and verified, binding this exact artifact to the source repository it claims to come from.
| Result | Verified |
|---|---|
| Ecosystem | npm |
| Reason | Verified |
| Discovered via | Registry attestation endpoint |
| Source repo | chrischall/splitwise-mcp |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/chrischall/splitwise-mcp/.github/workflows/release-please.yml@refs/heads/main |
| Rekor log index | 2881275161 |
| Predicate type | https://slsa.dev/provenance/v1 |
| Subject digest | sha512:5f3dee11ebe3b20e43194ff1d32f425997d5379a5d47485ffb6c0a9c32436f026f62b3867028a0cc77d59c45b0eaf2da9f713b644f9760c78cf55b197 |
Background: How many MCP packages publish verified provenance →
Dependencies 6 packages
| Packages resolved | 6 |
|---|---|
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
sw_add_user_to_group ~115
Add a user to a Splitwise group. Provide user_id (preferred, use sw_list_friends to resolve a name) or first_name + last_name + email to invite by email.
| Name | Type | Req | Description |
|---|---|---|---|
| confirm | boolean | – | Must be true to proceed. Without this, the tool returns a preview. |
| string | – | – | |
| first_name | string | – | – |
| group_id | number | yes | Group ID |
| last_name | string | – | – |
| user_id | number | – | User ID (preferred) |
No output schema declared.
No examples provided.
sw_create_comment ~87
Add a comment to a Splitwise expense (visible to other participants). Without confirm:true this returns a dry-run preview and makes NO network call; with confirm:true it posts.
| Name | Type | Req | Description |
|---|---|---|---|
| confirm | boolean | – | Must be true to proceed. Without this, the tool returns a preview. |
| content | string | yes | Comment text |
| expense_id | number | yes | Expense ID to comment on |
No output schema declared.
No examples provided.
sw_create_expense ~255
Create a Splitwise expense. Use split_equally:true to split evenly among group members, or provide a users array for custom per-person splits (paid_share and owed_share as decimal strings like "25.00"). cost must be a decimal string. Without confirm:true this returns a dry-run preview and makes NO network call; with confirm:true it creates the expense.
| Name | Type | Req | Description |
|---|---|---|---|
| category_id | number | – | Category id from sw_get_categories |
| confirm | boolean | – | Must be true to proceed. Without this, the tool returns a preview. |
| cost | string | yes | Total cost as decimal string, e.g. "25.00" |
| currency_code | string | – | Currency code, e.g. "USD". Defaults to group/user default. |
| date | string | – | ISO 8601 datetime |
| description | string | yes | Short description of the expense |
| details | string | – | Notes |
| group_id | number | yes | Group to add expense to (use 0 for no group) |
| split_equally | boolean | – | Split equally among group members (mutually exclusive with users) |
| users | array | – | Custom split (mutually exclusive with split_equally). Full list of participants required. |
No output schema declared.
No examples provided.
sw_create_friend ~112
Add a Splitwise friend by email (sends them an invite). Without confirm:true this returns a dry-run preview and makes NO network call; with confirm:true it adds the friend.
| Name | Type | Req | Description |
|---|---|---|---|
| confirm | boolean | – | Must be true to proceed. Without this, the tool returns a preview. |
| user_email | string | yes | Email of the user to add as a friend |
| user_first_name | string | – | First name of the user |
| user_last_name | string | – | Last name of the user |
No output schema declared.
No examples provided.
sw_create_group ~72
Create a new Splitwise group.
| Name | Type | Req | Description |
|---|---|---|---|
| confirm | boolean | – | Must be true to proceed. Without this, the tool returns a preview. |
| group_type | string | – | Type of group |
| name | string | yes | Group name |
| simplify_by_default | boolean | – | Whether to simplify debts by default |
No output schema declared.
No examples provided.
sw_delete_comment ~68
Delete a comment by id. Without confirm:true this returns a dry-run preview and makes NO network call; with confirm:true it deletes.
| Name | Type | Req | Description |
|---|---|---|---|
| confirm | boolean | – | Must be true to proceed. Without this, the tool returns a preview. |
| id | number | yes | Comment ID to delete |
No output schema declared.
No examples provided.
sw_delete_expense ~91
Soft-delete a Splitwise expense by id. Returns {success: true} on success. Use sw_undelete_expense to restore. Without confirm:true this returns a dry-run preview and makes NO network call; with confirm:true it deletes.
| Name | Type | Req | Description |
|---|---|---|---|
| confirm | boolean | – | Must be true to proceed. Without this, the tool returns a preview. |
| id | number | yes | Expense ID to delete |
No output schema declared.
No examples provided.
sw_delete_friend ~76
Remove a Splitwise friendship by user id. Without confirm:true this returns a dry-run preview and makes NO network call; with confirm:true it removes the friendship.
| Name | Type | Req | Description |
|---|---|---|---|
| confirm | boolean | – | Must be true to proceed. Without this, the tool returns a preview. |
| id | number | yes | User ID of the friend to remove |
No output schema declared.
No examples provided.
sw_delete_group ~69
Soft-delete a Splitwise group. Without confirm:true this returns a dry-run preview and makes NO network call; with confirm:true it deletes.
| Name | Type | Req | Description |
|---|---|---|---|
| confirm | boolean | – | Must be true to proceed. Without this, the tool returns a preview. |
| id | number | yes | Group ID to delete |
No output schema declared.
No examples provided.
sw_get_categories ~30
Get the hierarchical list of Splitwise expense categories. Use the returned id as category_id when creating expenses.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
sw_get_comments ~81
Get all comments on a Splitwise expense.
| Name | Type | Req | Description |
|---|---|---|---|
| expense_id | number | yes | Expense ID to get comments for |
| view | string | – | Response shape: "compact" (default) drops fields the response already carries elsewhere; "full" returns every field this server understands. compact drops the avatar URLs; "full" returns Splitwise's… |
No output schema declared.
No examples provided.
sw_get_currencies ~33
Get all Splitwise-supported currency codes and units. Use the currency_code value when creating expenses in non-default currencies.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
sw_get_current_user ~158
Get the authenticated Splitwise user's profile. Use the returned id when building custom expense splits. The compact default returns id, name (first_name + last_name joined), email and registration_status; pass view:'full' for Splitwise's raw record, which keeps first_name and last_name separate — the form sw_update_user takes.
| Name | Type | Req | Description |
|---|---|---|---|
| view | string | – | Response shape: "compact" (default) drops fields the response already carries elsewhere; "full" returns every field this server understands. compact returns {id, name, email, registration_status, bal… |
No output schema declared.
No examples provided.
sw_get_expense ~97
Get full details of a single Splitwise expense by id.
| Name | Type | Req | Description |
|---|---|---|---|
| id | number | yes | Expense ID |
| view | string | – | Response shape: "compact" (default) drops fields the response already carries elsewhere; "full" returns every field this server understands. compact keeps the share breakdown, repayments and receipt… |
No output schema declared.
No examples provided.
sw_get_group ~113
Get details of a single Splitwise group including all members and balances.
| Name | Type | Req | Description |
|---|---|---|---|
| id | number | yes | Group ID |
| view | string | – | Response shape: "compact" (default) drops fields the response already carries elsewhere; "full" returns every field this server understands. compact drops the avatar/cover-photo URLs (60% of a live 5… |
No output schema declared.
No examples provided.
sw_get_notifications ~69
Get recent Splitwise activity notifications for the current user.
| Name | Type | Req | Description |
|---|---|---|---|
| view | string | – | Response shape: "compact" (default) drops fields the response already carries elsewhere; "full" returns every field this server understands. compact drops the avatar URLs; "full" returns Splitwise's… |
No output schema declared.
No examples provided.
sw_get_receipt ~325
Download the receipt image or PDF attached to a Splitwise expense. The receipt URLs returned by sw_get_expense need the server's credentials — fetching them directly returns 401 — so use this tool instead. Set inline:true to get the bytes back in the result (images AND PDFs), or extract_text:true to get a PDF's text without the binary at all — both work when the caller can't see this server's filesystem. It also writes the file and returns the path, unless write:false or the filesystem is read-only.
| Name | Type | Req | Description |
|---|---|---|---|
| extract_text | boolean | – | Also return the PDF's text layer as `text`. Ideal for looking up line items or totals without transferring the file. PDFs only; a scanned receipt has no text layer to extract. |
| id | number | yes | Expense ID (the same id sw_get_expense takes) |
| inline | boolean | – | Return the receipt bytes in the result — an image block for images, an embedded resource for PDFs and everything else. Only for receipts under 4194304 bytes. |
| output_dir | string | – | Directory to write the receipt into. Defaults to $SPLITWISE_OUTPUT_DIR, else the current working directory. |
| size | string | – | Which stored rendition to fetch. Defaults to 'original' (full quality, and the only one a PDF receipt has). Falls back to the other rendition when the requested one is absent. |
| write | boolean | – | Write the receipt to disk. Defaults to true. Pass false when the caller cannot reach this server's filesystem, or when the server runs read-only. |
No output schema declared.
No examples provided.
sw_get_user ~138
Get another Splitwise user's profile by id. Same shape as sw_get_current_user: the compact default merges first_name/last_name into name, and view:'full' keeps them separate.
| Name | Type | Req | Description |
|---|---|---|---|
| id | number | yes | User ID |
| view | string | – | Response shape: "compact" (default) drops fields the response already carries elsewhere; "full" returns every field this server understands. compact returns {id, name, email, registration_status, bal… |
No output schema declared.
No examples provided.
sw_healthcheck Verify credentials and upstream reachability ~100
Resolves the credential the way real tools do, then makes one authenticated request to secure.splitwise.com. Reports which source supplied the credential, whether secure.splitwise.com accepted it, the round-trip time, and a plain-English hint distinguishing 'no credential' from 'credential rejected' from 'a secure.splitwise.com-side problem'. Read-only; never returns the credential itself. Call this when a real tool fails and you want to know which hop broke.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
sw_list_expenses ~223
List or search Splitwise expenses. All filters are optional. Use group_id to filter by group, dated_after/dated_before for date ranges.
| Name | Type | Req | Description |
|---|---|---|---|
| dated_after | string | – | ISO 8601 date — only expenses on or after this date |
| dated_before | string | – | ISO 8601 date — only expenses on or before this date |
| friend_id | number | – | Only expenses with this friend |
| group_id | number | – | Only expenses in this group |
| limit | number | – | Max results (API default: 20) |
| offset | number | – | Pagination offset |
| updated_after | string | – | ISO 8601 datetime |
| updated_before | string | – | ISO 8601 datetime |
| view | string | – | Response shape: "compact" (default) drops fields the response already carries elsewhere; "full" returns every field this server understands. compact keeps the share breakdown, repayments and receipt… |
No output schema declared.
No examples provided.
sw_list_friends ~170
List all Splitwise friends. Use this to resolve a friend's name to a user_id before adding them to a group or building a custom expense split. The compact default returns id, name (first_name + last_name joined), email, registration_status and any non-empty balance per friend; pass view:'full' for Splitwise's raw records, which keep first_name and last_name separate.
| Name | Type | Req | Description |
|---|---|---|---|
| view | string | – | Response shape: "compact" (default) drops fields the response already carries elsewhere; "full" returns every field this server understands. compact returns {id, name, email, registration_status, bal… |
No output schema declared.
No examples provided.
sw_list_groups ~123
List all Splitwise groups the current user belongs to. Returns id, name, and members for each group. Use this to resolve a group name to its id.
| Name | Type | Req | Description |
|---|---|---|---|
| view | string | – | Response shape: "compact" (default) drops fields the response already carries elsewhere; "full" returns every field this server understands. compact drops the avatar/cover-photo URLs (60% of a live 5… |
No output schema declared.
No examples provided.
sw_remove_user_from_group ~86
Remove a user from a Splitwise group. Without confirm:true this returns a dry-run preview and makes NO network call; with confirm:true it removes the user.
| Name | Type | Req | Description |
|---|---|---|---|
| confirm | boolean | – | Must be true to proceed. Without this, the tool returns a preview. |
| group_id | number | yes | Group ID |
| user_id | number | yes | User ID to remove |
No output schema declared.
No examples provided.
sw_undelete_expense ~32
Restore a soft-deleted Splitwise expense.
| Name | Type | Req | Description |
|---|---|---|---|
| id | number | yes | Expense ID to restore |
No output schema declared.
No examples provided.
sw_undelete_group ~31
Restore a soft-deleted Splitwise group.
| Name | Type | Req | Description |
|---|---|---|---|
| id | number | yes | Group ID to restore |
No output schema declared.
No examples provided.
sw_update_expense ~196
Edit an existing Splitwise expense. Provide expense_id and any fields to change. For custom split updates, the full users array must be provided (the API replaces the entire split). Without confirm:true this returns a dry-run preview and makes NO network call; with confirm:true it updates the expense.
| Name | Type | Req | Description |
|---|---|---|---|
| category_id | number | – | – |
| confirm | boolean | – | Must be true to proceed. Without this, the tool returns a preview. |
| cost | string | – | Decimal string, e.g. "25.00" |
| currency_code | string | – | – |
| date | string | – | – |
| description | string | – | – |
| details | string | – | – |
| expense_id | number | yes | ID of the expense to update |
| split_equally | boolean | – | Mutually exclusive with users |
| users | array | – | Full replacement split — all users must be included. Mutually exclusive with split_equally. |
No output schema declared.
No examples provided.
sw_update_user ~106
Update the current user's profile fields. id must be the current user's id.
| Name | Type | Req | Description |
|---|---|---|---|
| confirm | boolean | – | Must be true to proceed. Without this, the tool returns a preview. |
| default_currency | string | – | – |
| string | – | – | |
| first_name | string | – | – |
| id | number | yes | User ID (must be the current user's id) |
| last_name | string | – | – |
| locale | string | – | – |
| password | string | – | – |
No output schema declared.
No examples provided.
What is the io.github.chrischall/splitwise-mcp server?
io.github.chrischall/splitwise-mcp is listed in the public MCP registry as io.github.chrischall/splitwise-mcp. Splitwise expense and group management for Claude, shared expenses, settle up, friends. This page covers its npm package (splitwise-mcp).
Is the io.github.chrischall/splitwise-mcp server safe to use?
io.github.chrischall/splitwise-mcp scores 95 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 September 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the io.github.chrischall/splitwise-mcp server expose?
io.github.chrischall/splitwise-mcp exposes 27 tools: sw_get_current_user, sw_get_user, sw_update_user, sw_healthcheck, sw_list_groups, and 22 more. Their descriptions and schemas cost roughly 3,056 tokens of context every time the server is loaded.
Is the io.github.chrischall/splitwise-mcp server still maintained?
io.github.chrischall/splitwise-mcp is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the io.github.chrischall/splitwise-mcp server under?
io.github.chrischall/splitwise-mcp declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.