io.github.cmendezs/mcp-invoicenow-sg
PYPI · MCP-INVOICENOW-SG
MCP server for Singapore electronic invoicing (InvoiceNow)
Available components
Last scanned (1 day ago)
Scores higher than 96% of PyPI servers
Category Finance and Payments
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
- Runs hatchling.build at install time, a recognised build step with no custom scripting around it. View diagnostics → Pass
- 2 of 28 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency100
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to cmendezs/mcp-invoicenow-sg). View diagnostics → Pass
- Clear OSI-approved license (Apache-2.0).Pass
- Actively maintained (last published 52 days ago).Pass
- Publishes a security disclosure policy (SECURITY.md).Pass
Schema Quality & AI Usability71
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 2479 tokens (~145/item across 17 items; 17 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 Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage96
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 86% of tool parameters carry a description.Partial
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety75
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- 0 of 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "peppol_send" implies "send" and declares no destructiveHint at all, which the MCP spec reads as destructive by default. See how to fix → Fail
- An AI judge read all 18 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a current MCP spec version (2026-07-28).Pass
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.
- 1 Nov 26 0
- Stability: 0.97 → pass security
- 31 Oct 26 0
- Stability: pass → 0.97 functional
- 23 Oct 26 0
- Package version: 0.3.2 → 0.3.3 functional
- 22 Oct 26 +15
- Malware scan: unverified → pass ▲ security
- 19 Oct 26 0
- Stability: 0.97 → pass security
- 18 Oct 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.
- 17 Oct 26 −15
- Malware scan: pass → unverified ▼ security
- Package version: 0.3.2 → 0.3.3 functional
- 16 Oct 26 +16
- Malware scan: unverified → pass ▲ security
- Security disclosure: unverified → pass ▲ 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 4 Nov 2026 · Analysed pypi/mcp-invoicenow-sg@0.3.3
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 | pypi |
| Reason | Verified |
| Discovered via | Registry attestation endpoint |
| Source repo | cmendezs/mcp-invoicenow-sg |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/cmendezs/mcp-invoicenow-sg/.github/workflows/publish.yml@refs/tags/v0.3.3 |
| Rekor log index | 2805185680 |
| Predicate type | PyPI publish attestation https://docs.pypi.org/attestations/publish/v1 |
| Subject digest | sha256:60e43cb3113d71dcb9f19ef49048a3a4c5edc1044d6d7bb49760d20e7ecd3f5a |
Background: How many MCP packages publish verified provenance →
Install scripts 1 script
| Hook | Tier | Command |
|---|---|---|
| build_backend | allowlisted | hatchling.build |
Background: Why install scripts are a supply-chain risk →
Dependencies 28 packages
| Packages resolved | 28 |
|---|---|
| Stale | 1 |
| No linked repository | 1 |
| 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 →
check_document_type_id_in_codelist Check Document Type Id In Codelist ~95
Check whether a (scheme, value) pair is a recognized Peppol document type identifier. Requires EINVOICING_PEPPOL_CODELIST_DIR (see `list_participant_id_schemes`). Searches all entries regardless of state, so a historical (deprecated or removed) document type is still reported as found.
| Name | Type | Req | Description |
|---|---|---|---|
| scheme | string | yes | – |
| value | string | yes | – |
Structured output declared, but exposes no named fields.
No examples provided.
check_participant_id_scheme_in_codelist Check Participant Id Scheme In Codelist ~74
Check whether a 4-digit ISO 6523 ICD code (e.g. "0208") is a recognized Peppol scheme. Requires EINVOICING_PEPPOL_CODELIST_DIR (see `list_participant_id_schemes`).
| Name | Type | Req | Description |
|---|---|---|---|
| icd | string | yes | – |
Structured output declared, but exposes no named fields.
No examples provided.
check_process_id_in_codelist Check Process Id In Codelist ~68
Check whether a (scheme, value) pair is a recognized Peppol process identifier. Requires EINVOICING_PEPPOL_CODELIST_DIR (see `list_participant_id_schemes`).
| Name | Type | Req | Description |
|---|---|---|---|
| scheme | string | yes | – |
| value | string | yes | – |
Structured output declared, but exposes no named fields.
No examples provided.
generate_invoice_sg Generate Invoice Sg ~178
Build an SGInvoice from structured data and serialize it to UBL 2.1 XML. `invoice_data['profile']` (CustomizationID) and `invoice_data['business_process']` (ProfileID) select PINT-SG or SG Peppol BIS Billing 3.0, and must be a matched pair (TX2_Annex Annex B) — use get_profile_urn_sg to look up both values together rather than setting them independently. Returns the UBL XML (as a string) plus the customization_id/profile_id that were applied. Does not validate against Schematron — call validate_invoice_sg on the returned XML for that.
| Name | Type | Req | Description |
|---|---|---|---|
| invoice_data | object | yes | Invoice fields matching the SGInvoice schema (see get_profile_urn_sg for the profile URN to set). |
Structured output declared, but exposes no named fields.
No examples provided.
get_gst_category_codes_sg Get Gst Category Codes Sg ~76
Return the IRAS GST category codes accepted on Singapore invoices. Source: IRAS e-Tax Guide Annex E (supply/output-tax side only — the purchase-side codes are out of scope for sent invoices). `rate` is null for categories with no fixed rate ("NA" in the source table).
Input schema present but exposes no named parameters.
Structured output declared, but exposes no named fields.
No examples provided.
get_peppol_codelist_version Get Peppol Codelist Version ~32
Report the OpenPeppol eDEC code list release version(s) currently configured locally.
Input schema present but exposes no named parameters.
Structured output declared, but exposes no named fields.
No examples provided.
get_profile_urn_sg Get Profile Urn Sg ~204
Return the CustomizationID (BT-24) and ProfileID (BT-23) for a Singapore profile. CustomizationID comes from mcp_einvoicing_core.profile_registry (registered at import time in models/invoice.py); ProfileID is a shared Peppol process identifier, not per-country, so it is returned from a local constant rather than the registry. PINT_SG is the recommended profile for new senders — SG Peppol BIS Billing 3.0 (BIS3) predates the PINT programme and is positioned as legacy (per the package's own compliance reference, "Supported wire formats and profile URNs" — user-supplied guidance, not independently verified against an IRAS/IMDA notice). Not enforced as a hard default here; callers choose explicitly.
| Name | Type | Req | Description |
|---|---|---|---|
| profile | string | yes | Profile key: 'PINT_SG' or 'BIS3'. |
Structured output declared, but exposes no named fields.
No examples provided.
list_document_type_ids List Document Type Ids ~69
List Peppol document type identifiers from the OpenPeppol eDEC code list. Requires EINVOICING_PEPPOL_CODELIST_DIR (see `list_participant_id_schemes`).
| Name | Type | Req | Description |
|---|---|---|---|
| active_only | boolean | – | When True (default), omit deprecated/removed entries. |
Structured output declared, but exposes no named fields.
No examples provided.
list_participant_id_schemes List Participant Id Schemes ~120
List Peppol participant identifier (ICD) schemes from the OpenPeppol eDEC code list. Requires EINVOICING_PEPPOL_CODELIST_DIR to point at a local copy of the eDEC "Participant Identifier Schemes" GeneriCode export (not bundled with this package, no confirmed redistribution rights, see `mcp_einvoicing_core.peppol.codelists` module docstring).
| Name | Type | Req | Description |
|---|---|---|---|
| active_only | boolean | – | When True (default), omit deprecated/removed entries. |
Structured output declared, but exposes no named fields.
No examples provided.
list_process_ids List Process Ids ~67
List Peppol process identifiers from the OpenPeppol eDEC code list. Requires EINVOICING_PEPPOL_CODELIST_DIR (see `list_participant_id_schemes`).
| Name | Type | Req | Description |
|---|---|---|---|
| active_only | boolean | – | When True (default), omit deprecated/removed entries. |
Structured output declared, but exposes no named fields.
No examples provided.
list_spis_use_case_ids List Spis Use Case Ids ~73
List Peppol SPIS use case identifiers from the OpenPeppol eDEC code list. Requires EINVOICING_PEPPOL_CODELIST_DIR (see `list_participant_id_schemes`).
| Name | Type | Req | Description |
|---|---|---|---|
| active_only | boolean | – | When True (default), omit deprecated/removed entries. |
Structured output declared, but exposes no named fields.
No examples provided.
peppol_directory_search Peppol Directory Search ~188
Search the Peppol Directory for registered participants. Public, unauthenticated search (no relation to SMP lookup). At least one of q/participant/name/country/doctype must be supplied.
| Name | Type | Req | Description |
|---|---|---|---|
| country | – | – | Exact match on ISO 3166-2 country code. |
| doctype | – | – | Exact match on a full document type identifier URN. |
| environment | string | – | "production" or "test". |
| name | – | – | Partial match on business entity name (min. 3 characters). |
| participant | – | – | Exact match on a scheme-qualified participant ID (e.g. "iso6523-actorid-upis::0208:0123456789"). |
| q | – | – | General purpose query term, matched across all fields. |
| result_page_count | integer | – | Results per page. |
| result_page_index | integer | – | 0-based result page index. |
Structured output declared, but exposes no named fields.
No examples provided.
peppol_get_service_endpoint Peppol Get Service Endpoint ~153
Fetch the AS4 endpoint for a Peppol participant's document type. Resolves the SMP hostname via DNS, then fetches service metadata for *document_type_id*. If the SMP returns a redirect, the result's `redirect_url` is set and `endpoint_url` is None; callers must not follow more than one redirect hop (SMP 1.4.0 §3.2).
| Name | Type | Req | Description |
|---|---|---|---|
| document_type_id | string | – | Peppol document type identifier URN (default: BIS Billing 3.0 invoice). |
| environment | string | – | "production" or "test". |
| identifier | string | yes | Peppol participant ID or adaptable national identifier. |
Structured output declared, but exposes no named fields.
No examples provided.
peppol_lookup_participant Peppol Lookup Participant ~120
Check whether a business is registered on the Peppol network. Performs a DNS-over-HTTPS U-NAPTR lookup followed by an SMP service-group request to determine registration status and the list of supported document type identifiers.
| Name | Type | Req | Description |
|---|---|---|---|
| environment | string | – | "production" or "test". |
| identifier | string | yes | Peppol participant ID ("<scheme>:<value>") or a bare national identifier this server knows how to adapt (e.g. a VAT number, if a national identifier adapter is configured). |
Structured output declared, but exposes no named fields.
No examples provided.
peppol_send Peppol Send ~208
Send a UBL/CII invoice to a Peppol participant via AS4. Looks up the recipient's AS4 endpoint (SMP), builds the ebMS3/AS4 envelope, and transmits it using the supplied signing credentials.
| Name | Type | Req | Description |
|---|---|---|---|
| certificate_path | string | yes | Path to the PEM-encoded signing certificate. |
| document_type_id | string | – | Peppol document type identifier URN (default: BIS Billing 3.0 invoice). |
| environment | string | – | "production" or "test". |
| invoice_xml_base64 | string | yes | Base64-encoded UBL or CII invoice XML. |
| private_key_password | string | – | Optional password for the private key. |
| private_key_path | string | yes | Path to the PEM-encoded private key. |
| recipient_identifier | string | yes | Peppol participant ID or adaptable national identifier of the receiver. |
| sender_id | string | yes | Peppol AP identifier of the sender. |
Structured output declared, but exposes no named fields.
No examples provided.
resolve_peppol_dns Resolve Peppol Dns ~94
Resolve the SMP hostname for a Peppol participant via DNS only. Performs the raw U-NAPTR (SML) lookup without fetching the SMP service group, useful for diagnosing whether a participant is registered in the SML independently of SMP reachability.
| Name | Type | Req | Description |
|---|---|---|---|
| environment | string | – | "production" or "test". |
| identifier | string | yes | Peppol participant ID or adaptable national identifier. |
Structured output declared, but exposes no named fields.
No examples provided.
validate_invoice_sg Validate Invoice Sg ~259
Validate a UBL 2.1 XML invoice against IRAS's C5 acceptance-layer Schematron. Runs IRAS's own C5 acceptance layer (checks documents that IRAS itself would still reject, e.g. a missing buyer/seller UEN). The CEN EN16931 base ruleset, PINT-SG's own jurisdiction overlay, and SG Peppol BIS Billing 3.0 are NOT checked — see `scope` and the `EN16931-BASE-UNAVAILABLE` warning in the result, and validators/schematron.py's module docstring for why (SGInvoice's GST category codes have no sourced crosswalk to the UNCL5305 code list the base ruleset requires; tracked as [CORE-EN16931-BASE-SG-CROSSWALK-1]). Requires the optional `xslt2` extra (`pip install mcp-invoicenow-sg[xslt2]`) — the bundled stylesheet needs XSLT 2.0. If missing, returns `level="unavailable"`.
| Name | Type | Req | Description |
|---|---|---|---|
| xml_content | string | yes | UBL 2.1 Invoice or CreditNote XML content to validate. |
Structured output declared, but exposes no named fields.
No examples provided.
How do I install the io.github.cmendezs/mcp-invoicenow-sg server?
io.github.cmendezs/mcp-invoicenow-sg runs locally as a PyPI package, launched with uvx mcp-invoicenow-sg. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
pypi · mcp-invoicenow-sg
claude mcp add cmendezs-mcp-invoicenow-sg -- uvx mcp-invoicenow-sg
What is the io.github.cmendezs/mcp-invoicenow-sg server?
io.github.cmendezs/mcp-invoicenow-sg is listed in the public MCP registry as io.github.cmendezs/mcp-invoicenow-sg. MCP server for Singapore electronic invoicing (InvoiceNow). This page covers its PyPI package (mcp-invoicenow-sg).
Is the io.github.cmendezs/mcp-invoicenow-sg server safe to use?
io.github.cmendezs/mcp-invoicenow-sg scores 93 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 4 November 2026. 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.cmendezs/mcp-invoicenow-sg server expose?
io.github.cmendezs/mcp-invoicenow-sg exposes 17 tools: generate_invoice_sg, validate_invoice_sg, get_gst_category_codes_sg, get_profile_urn_sg, peppol_lookup_participant, and 12 more. Their descriptions and schemas cost roughly 2,078 tokens of context every time the server is loaded.
Is the io.github.cmendezs/mcp-invoicenow-sg server still maintained?
io.github.cmendezs/mcp-invoicenow-sg is still listed as active in the MCP registry. We last reached this channel on 4 November 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.cmendezs/mcp-invoicenow-sg server under?
io.github.cmendezs/mcp-invoicenow-sg declares the Apache-2.0 licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.