io.github.cyanheads/nonprofit-explorer-mcp-server
REMOTE · NONPROFIT-EXPLORER.CASEYJHAND.COM · 2 COMPONENTS · SCANNED SEP 20
MCP server for nonprofit financials via ProPublica — IRS Form 990 data for 1.8M+ nonprofits.
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 Security66
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 3 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- 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 Usability68
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 1040 tokens (~346/item across 3 items; 3 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 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 4 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
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'
{
"mcpServers": {
"cyanheads-nonprofit-explorer-mcp-server": {
"url": "https://nonprofit-explorer.caseyjhand.com/mcp"
}
}
} {
"servers": {
"cyanheads-nonprofit-explorer-mcp-server": {
"type": "http",
"url": "https://nonprofit-explorer.caseyjhand.com/mcp"
}
}
} [mcp_servers.cyanheads-nonprofit-explorer-mcp-server] url = "https://nonprofit-explorer.caseyjhand.com/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"cyanheads-nonprofit-explorer-mcp-server": {
"type": "remote",
"url": "https://nonprofit-explorer.caseyjhand.com/mcp",
"enabled": true
}
}
} openclaw mcp add cyanheads-nonprofit-explorer-mcp-server --url 'https://nonprofit-explorer.caseyjhand.com/mcp' --transport streamable-http
mcp_servers:
cyanheads-nonprofit-explorer-mcp-server:
url: "https://nonprofit-explorer.caseyjhand.com/mcp" {
"McpServers": {
"cyanheads-nonprofit-explorer-mcp-server": {
"Transport": "http",
"Url": "https://nonprofit-explorer.caseyjhand.com/mcp"
}
}
} assistant mcp add cyanheads-nonprofit-explorer-mcp-server -t streamable-http -u 'https://nonprofit-explorer.caseyjhand.com/mcp'
{
"mcpServers": {
"cyanheads-nonprofit-explorer-mcp-server": {
"type": "http",
"url": "https://nonprofit-explorer.caseyjhand.com/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
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 0
- Server version: 0.1.8 → 0.1.9 functional
- 9 Sept 26 +1
- Stability: 0.97 → pass security
- 7 Sept 26 −1
- Stability: pass → 0.93 functional
- 26 Aug 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Aug 26 0
- Stability: 0.97 → pass security
- MCP protocol: Implements a current MCP spec version (2026-07-28). functional
- MCP protocol version: 2025-11-25 → 2026-07-28 functional
- Server version: 0.1.7 → 0.1.8 functional
- 24 Aug 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.
- 13 Aug 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Tool “nonprofit_search” 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
- Tool “nonprofit_get_filings” rewrote its description, which is the text the model reads security
- Schema quality: 308 → 346 ▼ functional
- Server version: 0.1.5 → 0.1.7 functional
- Server version: 0.1.4 → 0.1.5 functional
- “nonprofit_search” reworded the description of “query” cosmetic
- “nonprofit_search” reworded the description of “subsection_code” cosmetic
- “nonprofit_search” reworded the description of “state” cosmetic
- 11 Aug 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
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 · 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 | 4 Sept 2026 | 3 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | a6985204ed51ae050e7738aa6be668e9 |
| 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. | present | 19718 | 13 | Verified |
| caseyjhand.com. | present | 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 ~173
All Form 990 filings for a tax-exempt org by EIN: year-by-year revenue, expenses, assets, liabilities, net assets, revenue breakdown, executive compensation, and source PDF links. Use for trend analysis, due diligence, and accessing primary 990 documents. The filing year (tax_prd_yr) is the fiscal year of the return — data lags 1–2 years; always cite the year. An organization that resolves but has filed no 990 returns an empty filings array with a notice, not an error. Also returns filings_pdf_only — older filings with a PDF but no extracted financial data. Data from ProPublica Nonprofit Explorer, sourced from IRS Form 990 filings.
| Name | Type | Req | Description |
|---|---|---|---|
| ein | – | yes | Employer Identification Number. Use nonprofit_search to resolve an org name to its EIN. |
| 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 | – | Older filings with a PDF but no extracted financial data. |
| name | string | – | Legal org name per IRS. |
| notice | string | – | Present when the organization resolved but Nonprofit Explorer holds no filing of any kind for it — names the org and why the filing history is empty. An empty filings array without this notice means… |
| propublica_url | string | – | ProPublica Nonprofit Explorer URL for this org. |
| total_filings_pdf_only | number | – | Count of PDF-only filings (no extracted data). |
| total_filings_with_data | number | – | Count of filings with extracted financial data. |
No examples provided.
nonprofit_get_organization Get Nonprofit Organization ~184
Full profile for a single tax-exempt org by EIN: legal name, address, NTEE classification, 501(c) type, IRS ruling date, and a financial snapshot from the most recent Form 990 filing (revenue, expenses, assets, net assets, and the source PDF link). Also returns the IRS Business Master File standing — whether contributions are deductible, exemption status, and public-charity vs. private-foundation classification. Use nonprofit_search first if you only have an org name — this tool requires an EIN. Data lags 1–2 years; the tax year is shown prominently. Data from ProPublica Nonprofit Explorer, sourced from 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 results. |
| Name | Type | Req | Description |
|---|---|---|---|
| address | string|null | – | Street address. 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. |
| 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… |
| income_amount | number|null | – | Most recent IRS BMF total income in USD. Null when not on record. |
| latest_filing | – | – | Financial snapshot from the most recent Form 990. Null if no filings_with_data are available. |
| name | string | – | Legal org name per IRS. |
| ntee_code | string|null | – | Full NTEE code (e.g., "E210" = hospital). Null when unclassified. |
| 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 Search Nonprofits ~570
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 (National Taxonomy of Exempt Entities) major group integer (1–10). 1=Arts/Culture/Humanities, 2=Education, 3=Environment/Animals, 4=Health, 5=Human Services, 6=International/Foreign Affairs, 7=P… |
| 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 | – | Two-letter US state, territory, or military postal code (e.g., "WA", "NY", "PR"). Case-insensitive — normalized to uppercase before filtering. A code outside that set is rejected rather than silently… |
| 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.
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 81 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, nonprofit_get_organization, nonprofit_get_filings. Their descriptions and schemas cost roughly 927 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 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.