io.github.cyanheads/nonprofit-explorer-mcp-server
REMOTE · NONPROFIT-EXPLORER.CASEYJHAND.COM · 2 COMPONENTS
MCP server for nonprofit financials via ProPublica: IRS Form 990 data for 1.8M+ nonprofits.
Last scanned (5 hours ago)
Scores higher than 89% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Finance and Payments
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security83
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Nothing on it is marked destructive, but we can't show that an anonymous caller can only read: full credit needs the server to list at least one tool and every tool to be verifiably read-only. We use a best-effort check of tool names and descriptions to tell read-only tools from tools that change things, so some genuinely read-only tools may not get full credit. Names that start with a read verb (get, list, read, search and similar) and accurate readOnlyHint annotations help. Meet that to earn full credit, or require authorisation. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC is configured correctly; the domain's records validate against the full chain to the root. View diagnostics → Pass
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability76
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 1105 tokens (~276/item across 4 items; 3 tools + 1 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 Management67
- Stability check failed: schema churn in the 30 days we've observed: 1 tool removals, 0 breaking changes, 0 auth/transport breaks, 1 additions. See how to fix → Fail
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 5 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
Checks we ran (13)
- TLS certificate
- Authorization
- HTTPS
- HSTS header
- DNSSEC
- Transport
- Schema quality
- Stability
- Tool coverage
- Injection markers
- Destructive annotations
- Judged manipulation
- MCP protocol
Does not apply to this hosted endpoint (2)
- Supply Chain SecurityScored on package channels only. This is a hosted endpoint, so there is nothing to install or inspect.
- Provenance & TransparencyScored on package channels only. This is a hosted endpoint, so there is nothing to install or inspect.
The score does not measure everything. What the score does not measure →
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.
- 3 Nov 26 +2
- The server rewrote its instructions, which are the text every model session reads security
- Tool “nonprofit_get_filings” rewrote its description, which is the text the model reads security
- Tool “nonprofit_get_organization” rewrote its description, which is the text the model reads security
- Schema quality: 350 → 276 ▲ functional
- Schema quality: unverified → 100 ▲ functional
- New resource “nonprofit-explorer-guide” functional
- Server version: 0.2.0 → 0.3.0 functional
- “nonprofit_get_filings” added an optional parameter “to_year” cosmetic
- “nonprofit_get_filings” added an optional parameter “from_year” cosmetic
- “nonprofit_search_organizations” reworded the description of “ntee_category” cosmetic
- “nonprofit_search_organizations” reworded the description of “state” cosmetic
- 22 Oct 26 −5
- Stability: pass → fail ▼ security
- Tool “nonprofit_search” was removed ▼ security
- The server rewrote its instructions, which are the text every model session reads security
- Tool “nonprofit_get_organization” rewrote its description, which is the text the model reads security
- Server version: 0.1.10 → 0.2.0 functional
- New tool “nonprofit_search_organizations” functional
- “nonprofit_get_organization” reworded the description of “ein” cosmetic
- “nonprofit_get_filings” reworded the description of “ein” cosmetic
- 10 Oct 26 0
- Server version: 0.1.9 → 0.1.10 functional
- 28 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 20 Sept 26 0
- Server version: 0.1.8 → 0.1.9 functional
- 9 Sept 26 0
- Stability: 0.97 → pass security
- 7 Sept 26 0
- Stability: pass → 0.93 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 5 Nov 2026 · Probed https://nonprofit-explorer.caseyjhand.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=caseyjhand.com | CN=WE1,O=Google Trust Services,C=US | 2 Nov 2026 | 31 Jan 2027 | ECDSA 256 | ECDSA-SHA256 | 995a30681ab772540e934241ca1d576c |
| SANs: caseyjhand.com, *.caseyjhand.com | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC secure
Validation of nonprofit-explorer.caseyjhand.com. — Secure
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | Trust anchor | 20326, 38696 | 8, 8 | Verified |
| com. | DS published | 19718 | 13 | Verified |
| caseyjhand.com. | DS published | 2371 | 13 | Verified |
| nonprofit-explorer.caseyjhand.com. | Verified address RRset verified with the apex keys |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=63072000; includeSubDomains; preload |
| x-content-type-options | nosniff |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://nonprofit-explorer.caseyjhand.com/mcp | Verified | 200 | |
| http (plaintext) | http://nonprofit-explorer.caseyjhand.com/mcp | HTTPS enforced | 301 | https://nonprofit-explorer.caseyjhand.com/mcp |
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 →
nonprofit_get_filings Get Nonprofit Filings ~190
Form 990 history by EIN with extracted financials, form-specific compensation, and PDF-only returns. Optional inclusive from_year/to_year bounds select fiscal years across both histories; omitted bounds return full history. Unfiltered totals remain available. Records are sorted by full tax period without amendment precedence. Empty dataset history succeeds with BMF context; an empty selected window does not imply no history. Data lags 1–2 years; always cite tax_prd_yr. Data from ProPublica Nonprofit Explorer and IRS Form 990 filings.
| Name | Type | Req | Description |
|---|---|---|---|
| ein | – | yes | Employer Identification Number. Use nonprofit_search_organizations to resolve an org name to its EIN. |
| from_year | integer | – | Inclusive minimum fiscal year (tax_prd_yr). Omit for no lower bound. |
| to_year | integer | – | Inclusive maximum fiscal year (tax_prd_yr). Omit for no upper bound. |
| Name | Type | Req | Description |
|---|---|---|---|
| data_source | string | – | ProPublica + IRS attribution text. |
| ein | number | – | Employer Identification Number as integer. |
| error | object | – | Present when the call failed. Absent on success. |
| filings | array | – | Filings with extracted financial data, sorted newest first. |
| filings_pdf_only | array | – | PDF-only returns sorted by full tax period, retaining equal-period entries. |
| from_year | – | – | Applied inclusive lower fiscal-year bound. Null when omitted. |
| name | string | – | Legal org name per IRS. |
| notice | string | – | Present only when the complete dataset history is empty, with BMF context and no inferred cause. A selected window can be empty while unfiltered totals show existing history. |
| propublica_url | string | – | ProPublica Nonprofit Explorer URL for this org. |
| to_year | – | – | Applied inclusive upper fiscal-year bound. Null when omitted. |
| total_filings_pdf_only | number | – | Unfiltered count of PDF-only filings (no extracted data). |
| total_filings_with_data | number | – | Unfiltered count of filings with extracted financial data. |
No examples provided.
nonprofit_get_organization Get Nonprofit Organization ~144
Full profile for a tax-exempt org by EIN: legal identity, IRS classification and BMF filing requirements, latest extracted financial snapshot, and latest return metadata across extracted and PDF-only histories. Use nonprofit_search_organizations first to resolve a name to an EIN. latest_filing is the latest extracted snapshot; latest_return may be newer. Data lags 1–2 years; always cite the fiscal year. Data from ProPublica Nonprofit Explorer and IRS Form 990 filings.
| Name | Type | Req | Description |
|---|---|---|---|
| ein | – | yes | Employer Identification Number. Accepts integer (530196605) or string with optional hyphen ("53-0196605"). Obtain from nonprofit_search_organizations results. |
| Name | Type | Req | Description |
|---|---|---|---|
| address | string|null | – | Street address. Null when not on record. |
| affiliation | string|null | – | IRS BMF affiliation as <raw code> — <meaning>. Group affiliation alone does not prove inclusion in a group return. Null when not on record. |
| asset_amount | number|null | – | Most recent IRS BMF total assets in USD. Null when not on record. |
| bmf_tax_period | string|null | – | Tax period of the latest return recorded in the IRS Business Master File (e.g. "2025-06-01"). Often more recent than latest_filing.tax_prd_yr, which reflects the newest 990 ProPublica has extracted.… |
| city | string|null | – | City. Null when not on record. |
| data_source | string | – | ProPublica + IRS attribution text. |
| deductible | string|null | – | Whether contributions to this org are tax-deductible, as "<IRS code> — <meaning>". Three states, not two: code 1 deductible, code 2 not deductible, code 4 deductible by treaty (foreign orgs). Null wh… |
| ein | number | – | Employer Identification Number as integer. |
| error | object | – | Present when the call failed. Absent on success. |
| exempt_status | string|null | – | IRS exemption status as "<IRS code> — <meaning>"; code 1 is an unconditional exemption. This records what the IRS granted, not whether the exemption is still in force — the Business Master File is a… |
| filing_count | number | – | Total filings with extracted data on record. |
| filing_count_pdf_only | number | – | Total PDF-only filings without extracted financial data. Use nonprofit_get_filings for their PDF links. |
| filing_requirement | string|null | – | IRS BMF filing requirement as <raw code> — <meaning>. Null when not on record; unknown codes retained. |
| foundation_type | string|null | – | IRS foundation classification as "<IRS code> — <meaning>", separating public charities (codes 10–25) from private foundations (codes 2–4). Codes 0 (all organizations except 501(c)(3)) and 9 (suspense… |
| group_exemption_number | number|null | – | IRS BMF group exemption number. Zero means none assigned; null means not on record. Does not prove inclusion in a group return. |
| income_amount | number|null | – | Most recent IRS BMF total income in USD. Null when not on record. |
| latest_filing | – | – | Latest extracted financial snapshot, which can predate PDF-only returns. Null if no filings_with_data are available. |
| latest_return | – | – | Newest return across extracted and PDF-only histories, ordered by full tax period. Null when no history exists; equal-period entries imply no amendment precedence. |
| name | string | – | Legal org name per IRS. |
| notice | string | – | Present only when both filing histories are empty. Describes dataset absence and BMF context without inferring its cause. |
| ntee_code | string|null | – | Full NTEE code (e.g., "E210" = hospital). Null when unclassified. |
| pf_filing_requirement | string|null | – | IRS BMF private-foundation filing requirement as <raw code> — <meaning>. Null when not on record. |
| propublica_url | string | – | ProPublica Nonprofit Explorer URL for this org. |
| revenue_amount | number|null | – | Most recent IRS BMF total revenue in USD. Null when not on record. |
| ruling_date | string|null | – | ISO date of IRS recognition (e.g., "1946-07"). Null when not on record. |
| sort_name | string|null | – | IRS Business Master File secondary name line (SORT_NAME) — an internal sort key such as a division or service-center label, not an alternate organization name. Null for most orgs. |
| state | string|null | – | Two-letter state abbreviation. Null when not on record. |
| strein | string | – | EIN in "XX-XXXXXXX" format. |
| subsection_code | number|null | – | 501(c) subsection number (e.g., 3 = charitable organization, covering both public charities and private foundations — see foundation_type to tell them apart). Null when not classified. |
| zipcode | string|null | – | ZIP code. Null when not on record. |
No examples provided.
nonprofit_search_organizations Search Nonprofits ~583
Search 1.8M+ IRS-recognized tax-exempt organizations by name, keyword, city, or phrase. Optionally narrow by US state, NTEE major sector (1–10), or 501(c) subsection type. Returns EINs — pass them to nonprofit_get_organization or nonprofit_get_filings for details. Results are paginated at 25 per page; use the page parameter and num_pages to paginate. Total results cap at 10,000 in the API; if total_results === 10000 the actual count may be higher. A zero-match query and a page past the last one both return an empty organizations array with a notice rather than an error; only a page whose offset reaches that 10,000 cap is refused. Supports quoted phrases ("Red Cross"), required terms (+evanston), excluded terms (-dental). Data from ProPublica Nonprofit Explorer, sourced from IRS Form 990 filings.
| Name | Type | Req | Description |
|---|---|---|---|
| ntee_category | string | – | NTEE major group digit string (1–10) or case-insensitive major letter: A→1 Arts/Culture/Humanities, B→2 Education, C–D→3 Environment/Animals, E–H→4 Health, I–P→5 Human Services, Q→6 International/For… |
| page | integer | – | Zero-indexed page number. 25 results per page. Total pages is in num_pages. Increment to paginate large result sets. |
| query | string | yes | Keyword search string. Searched against org name, the secondary name line, and city in order of relevance. Supports: quoted phrases ("Red Cross"), required terms (+evanston), excluded terms (-dental)… |
| state | string | – | US state or territory name (e.g., "Washington", "Puerto Rico") or two-letter state, territory, or military postal code. Trimmed and case-insensitive; normalized to a postal code before filtering. Unr… |
| subsection_code | string | – | 501(c) subsection code. "3" = charitable/religious/educational organization (most common — includes both public charities and private foundations; nonprofit_get_organization returns foundation_type t… |
| Name | Type | Req | Description |
|---|---|---|---|
| active_filters | object | – | Active filters echoed back for verification. |
| cur_page | number | – | Current page (zero-indexed). |
| data_source | string | – | ProPublica + IRS attribution text. |
| error | object | – | Present when the call failed. Absent on success. |
| notice | string | – | Present when the response needs a caveat the domain fields cannot carry: a page that returned no organizations (distinguishing a zero-match query from a page past the end of the result set, and namin… |
| num_pages | number | – | Total pages available (total_results / 25, ceiling). The last valid page is num_pages - 1. |
| organizations | array | – | Matching organizations for the current page. |
| page_offset | number | – | Zero-indexed offset of the first result on this page. Requests are refused once this reaches 10,000. |
| per_page | number | – | Results per page applied by the API (25). |
| total_results | number | – | Total matching orgs (up to 10,000 — the API ceiling). If 10000, actual count may be higher. |
No examples provided.
How do I install the io.github.cyanheads/nonprofit-explorer-mcp-server server?
io.github.cyanheads/nonprofit-explorer-mcp-server is a hosted endpoint at https://nonprofit-explorer.caseyjhand.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · nonprofit-explorer.caseyjhand.com
claude mcp add --transport http cyanheads-nonprofit-explorer-mcp-server 'https://nonprofit-explorer.caseyjhand.com/mcp'
What is the io.github.cyanheads/nonprofit-explorer-mcp-server server?
io.github.cyanheads/nonprofit-explorer-mcp-server is listed in the public MCP registry as io.github.cyanheads/nonprofit-explorer-mcp-server. MCP server for nonprofit financials via ProPublica: IRS Form 990 data for 1.8M+ nonprofits. This page covers its hosted endpoint (https://nonprofit-explorer.caseyjhand.com/mcp).
Is the io.github.cyanheads/nonprofit-explorer-mcp-server server safe to use?
io.github.cyanheads/nonprofit-explorer-mcp-server scores 84 out of 100 on VerifyMCP. 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.cyanheads/nonprofit-explorer-mcp-server server expose?
io.github.cyanheads/nonprofit-explorer-mcp-server exposes 3 tools: nonprofit_search_organizations, nonprofit_get_organization, nonprofit_get_filings. Their descriptions and schemas cost roughly 917 tokens of context every time the server is loaded.
Does the io.github.cyanheads/nonprofit-explorer-mcp-server server require authentication?
No. We connected to io.github.cyanheads/nonprofit-explorer-mcp-server without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the io.github.cyanheads/nonprofit-explorer-mcp-server server still maintained?
io.github.cyanheads/nonprofit-explorer-mcp-server is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What did VerifyMCP test on the io.github.cyanheads/nonprofit-explorer-mcp-server server?
VerifyMCP ran 13 checks on io.github.cyanheads/nonprofit-explorer-mcp-server, covering TLS certificate, Authorization, HTTPS, HSTS header and 9 more. Supply Chain Security and Provenance & Transparency do not apply to a hosted endpoint, so they were not tested. The score does not measure everything, and the scoring documentation lists what it leaves out.