io.usefulapi/gumroad
REMOTE · GUMROAD.USEFULAPI.IO · SCANNED SEP 20
Read products, sales, subscribers and offer codes; verify, enable and disable product licenses.
Available components
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 Security78
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation is enforced on tool calls, advertised via RFC 9728 protected-resource metadata. Discovery is public, which costs nothing: no tool can be invoked without a token. View diagnostics → Pass
- HTTPS enforcement could not be verified: the plaintext port answered with HTTP 401, which proves neither a plaintext path nor enforcement. View diagnostics → Unverified
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
- The authorisation server offers only Dynamic Client Registration (RFC 7591), which MCP 2026-07-28 deprecated in favour of Client ID Metadata Documents. View diagnostics → Partial
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability83
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 1339 tokens (~66/item across 20 items; 20 tools + 0 resources), lean.Pass
- 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
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 20 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 20 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities60
- Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
How do I install the io.usefulapi/gumroad MCP server?
io.usefulapi/gumroad is a hosted endpoint at https://gumroad.usefulapi.io/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 · gumroad.usefulapi.io
claude mcp add --transport http io-usefulapi-gumroad 'https://gumroad.usefulapi.io/mcp'
{
"mcpServers": {
"io-usefulapi-gumroad": {
"url": "https://gumroad.usefulapi.io/mcp"
}
}
} {
"servers": {
"io-usefulapi-gumroad": {
"type": "http",
"url": "https://gumroad.usefulapi.io/mcp"
}
}
} [mcp_servers.io-usefulapi-gumroad] url = "https://gumroad.usefulapi.io/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"io-usefulapi-gumroad": {
"type": "remote",
"url": "https://gumroad.usefulapi.io/mcp",
"enabled": true
}
}
} openclaw mcp add io-usefulapi-gumroad --url 'https://gumroad.usefulapi.io/mcp' --transport streamable-http
mcp_servers:
io-usefulapi-gumroad:
url: "https://gumroad.usefulapi.io/mcp" {
"McpServers": {
"io-usefulapi-gumroad": {
"Transport": "http",
"Url": "https://gumroad.usefulapi.io/mcp"
}
}
} assistant mcp add io-usefulapi-gumroad -t streamable-http -u 'https://gumroad.usefulapi.io/mcp'
{
"mcpServers": {
"io-usefulapi-gumroad": {
"type": "http",
"url": "https://gumroad.usefulapi.io/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.
- 1 Sept 26 +1
- Stability: 0.97 → pass security
- 30 Aug 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.
- 28 Aug 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.
- 26 Aug 26 +2
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 24 Aug 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 70 to 73. That category is still filling its 30-day observation window: 21 days of observed history at the previous scan, 22 at this one. The score rises as the window fills, whether or not the server changes.
- 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
- 3 Aug 26 0
- Stability: unverified → 0.03 ▲ functional
- 2 Aug 26 0
- Authorization: unverified → pass ▲ security
- Transport: fail → pass ▲ security
- First check of Authorization: partial security
- MCP protocol: unverified → fail ▼ functional
- Tool coverage: unverified → 100 ▲ functional
- First check of Schema quality: fail functional
- First check of Schema quality: pass functional
- First check of Schema quality: good functional
- First check of Tool coverage: 100 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://gumroad.usefulapi.io/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=usefulapi.io | CN=WE1,O=Google Trust Services,C=US | 1 Aug 2026 | 30 Oct 2026 | ECDSA 256 | ECDSA-SHA256 | 81c12489d2c9f50f132d4c4e2e52e382 |
| SANs: usefulapi.io, gumroad.usefulapi.io, *.gumroad.usefulapi.io | ||||||
| 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 insecure
Validation of gumroad.usefulapi.io. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| io. | present | 57355 | 8 | Verified |
| usefulapi.io. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Enforced and verified
The endpoint asked for a token and published valid RFC 9728 metadata describing how to get one.
| Result | Enforced and verified |
|---|---|
| Enforced | On tool calls |
| HTTP status | 200 |
WWW-Authenticate challenge Bearer realm="OAuth", resource_metadata="https://gumroad.usefulapi.io/.well-known/oauth-protected-resource/mcp", error="invalid_token", error_description="Missing or invalid access token"
Bearer realm="OAuth", resource_metadata="https://gumroad.usefulapi.io/.well-known/oauth-protected-resource/mcp", error="invalid_token", error_description="Missing or invalid access token"Protected resource metadata
| Document | https://gumroad.usefulapi.io/.well-known/oauth-protected-resource/mcp |
|---|---|
| Retrieved | Yes |
| Resource | https://gumroad.usefulapi.io/mcp |
| Authorisation server | https://gumroad.usefulapi.io |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://gumroad.usefulapi.io/mcp | Verified | 200 | |
| http (plaintext) | http://gumroad.usefulapi.io/mcp | Inconclusive | 401 |
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 →
gumroad_create_offer_code Create offer code ~178
Create a new offer code (discount code) on a product. Gumroad REST: POST /v2/products/{product_id}/offer_codes.
| Name | Type | Req | Description |
|---|---|---|---|
| amount_off | integer | yes | The amount off — in cents when offer_type is 'cents', or a percentage when 'percent'. |
| max_purchase_count | integer | – | Optional cap on how many times the offer code can be used. |
| name | string | yes | The discount code text buyers enter (e.g. LAUNCH20). |
| offer_type | string | – | Whether amount_off is a fixed amount in 'cents' or a 'percent' discount (default 'cents'). |
| product_id | string | yes | The product id to create the offer code on. |
| universal | boolean | – | Whether the offer code applies to all of the user's products (default false). |
No output schema declared.
No examples provided.
gumroad_disable_license Disable license ~57
Disable a product's license key. Gumroad REST: PUT /v2/licenses/disable.
| Name | Type | Req | Description |
|---|---|---|---|
| license_key | string | yes | The license key to disable. |
| product_id | string | yes | The product id the license belongs to. |
No output schema declared.
No examples provided.
gumroad_disable_product Disable product ~51
Disable (unpublish) a product so it can no longer be sold. Gumroad REST: PUT /v2/products/{id}/disable.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The product id to disable. |
No output schema declared.
No examples provided.
gumroad_enable_license Enable license ~57
Enable a product's license key. Gumroad REST: PUT /v2/licenses/enable.
| Name | Type | Req | Description |
|---|---|---|---|
| license_key | string | yes | The license key to enable. |
| product_id | string | yes | The product id the license belongs to. |
No output schema declared.
No examples provided.
gumroad_enable_product Enable product ~48
Enable (publish) a product so it can be sold. Gumroad REST: PUT /v2/products/{id}/enable.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The product id to enable. |
No output schema declared.
No examples provided.
gumroad_get_offer_code Get offer code ~62
Get a single offer code on a product by id. Gumroad REST: GET /v2/products/{product_id}/offer_codes/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The offer code id. |
| product_id | string | yes | The product id. |
No output schema declared.
No examples provided.
gumroad_get_product Get product ~39
Get a single product by id. Gumroad REST: GET /v2/products/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The product id. |
No output schema declared.
No examples provided.
gumroad_get_sale Get sale ~40
Get a single sale by id. Gumroad REST: GET /v2/sales/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The sale id. |
No output schema declared.
No examples provided.
gumroad_get_subscriber Get subscriber ~41
Get a single subscriber by id. Gumroad REST: GET /v2/subscribers/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The subscriber id. |
No output schema declared.
No examples provided.
gumroad_get_user Get user ~33
Get the authenticated user associated with the current Gumroad access token. Gumroad REST: GET /v2/user.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
gumroad_get_variant_category Get variant category ~62
Get a single variant category on a product by id. Gumroad REST: GET /v2/products/{product_id}/variant_categories/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The variant category id. |
| product_id | string | yes | The product id. |
No output schema declared.
No examples provided.
gumroad_list_custom_fields List custom fields ~51
List a product's custom fields (extra fields collected at checkout). Gumroad REST: GET /v2/products/{product_id}/custom_fields.
| Name | Type | Req | Description |
|---|---|---|---|
| product_id | string | yes | The product id. |
No output schema declared.
No examples provided.
gumroad_list_offer_codes List offer codes ~48
List a product's offer codes (discount codes). Gumroad REST: GET /v2/products/{product_id}/offer_codes.
| Name | Type | Req | Description |
|---|---|---|---|
| product_id | string | yes | The product id. |
No output schema declared.
No examples provided.
gumroad_list_products List products ~28
List all of the authenticated user's products. Gumroad REST: GET /v2/products.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
gumroad_list_resource_subscriptions List resource subscriptions ~58
List the authenticated user's resource subscriptions (webhooks) for a given resource/event name. Gumroad REST: GET /v2/resource_subscriptions.
| Name | Type | Req | Description |
|---|---|---|---|
| resource_name | string | yes | The resource/event name whose webhook subscriptions to list. |
No output schema declared.
No examples provided.
gumroad_list_sales List sales ~152
List/filter the authenticated user's successful sales, most recent first. Supports date, email, product/order filters and cursor pagination via page_key. Gumroad REST: GET /v2/sales.
| Name | Type | Req | Description |
|---|---|---|---|
| after | string | – | Only sales after this date, formatted YYYY-MM-DD. |
| before | string | – | Only sales before this date, formatted YYYY-MM-DD. |
| string | – | Filter to sales to this buyer email. | |
| order_id | string | – | Filter to a specific order id. |
| page_key | string | – | Pagination cursor — pass the value from a previous response's next_page_key to fetch the next page. |
| product_id | string | – | Filter to sales of this product id. |
No output schema declared.
No examples provided.
gumroad_list_subscribers List subscribers ~69
List a membership/subscription product's subscribers, optionally filtered by buyer email. Gumroad REST: GET /v2/products/{product_id}/subscribers.
| Name | Type | Req | Description |
|---|---|---|---|
| string | – | Filter to the subscriber with this buyer email. | |
| product_id | string | yes | The membership product id. |
No output schema declared.
No examples provided.
gumroad_list_variant_categories List variant categories ~48
List a product's variant categories (option groups). Gumroad REST: GET /v2/products/{product_id}/variant_categories.
| Name | Type | Req | Description |
|---|---|---|---|
| product_id | string | yes | The product id. |
No output schema declared.
No examples provided.
gumroad_update_offer_code Update offer code ~110
Update an existing offer code on a product (its code text and/or its max purchase count). Gumroad REST: PUT /v2/products/{product_id}/offer_codes/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The offer code id to update. |
| max_purchase_count | integer | – | New cap on how many times the offer code can be used. |
| offer_code | string | – | New discount code text. |
| product_id | string | yes | The product id the offer code belongs to. |
No output schema declared.
No examples provided.
gumroad_verify_license Verify license ~107
Verify a license key for a product (checks validity and returns purchase details). By default this does NOT increment the uses count (no side effect). Gumroad REST: POST /v2/licenses/verify.
| Name | Type | Req | Description |
|---|---|---|---|
| increment_uses_count | boolean | – | Whether to increment the license's uses count (default false — pass true to record a use). |
| license_key | string | yes | The license key to verify. |
| product_id | string | yes | The product id the license belongs to. |
No output schema declared.
No examples provided.
What is the io.usefulapi/gumroad MCP server?
io.usefulapi/gumroad is an MCP server listed in the public MCP registry as io.usefulapi/gumroad. Read products, sales, subscribers and offer codes; verify, enable and disable product licenses. This page covers its hosted endpoint (https://gumroad.usefulapi.io/mcp).
Is the io.usefulapi/gumroad MCP server safe to use?
io.usefulapi/gumroad scores 87 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.usefulapi/gumroad MCP server expose?
io.usefulapi/gumroad exposes 20 tools: gumroad_get_user, gumroad_list_products, gumroad_get_product, gumroad_list_sales, gumroad_get_sale, and 15 more. Their descriptions and schemas cost roughly 1,339 tokens of context every time the server is loaded.
Does the io.usefulapi/gumroad MCP server require authentication?
Yes. io.usefulapi/gumroad asked us for credentials when we connected, so you will need to authorise it in your MCP client before it can do anything.
Is the io.usefulapi/gumroad MCP server still maintained?
io.usefulapi/gumroad 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.