WebhookTest.net
REMOTE · WEBHOOKTEST.NET · SCANNED SEP 24
Anonymous webhook capture, inspection, waiting, and response configuration for AI agents.
Available components
Recent critical change
Authorization (18 Sept 2026). See the changelog before you install this server.
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 Security57
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation check failed: no authorisation is required to call this server, and it exposes a tool marked destructive (clear_webhooks). See how to fix → View diagnostics → Fail
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- 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
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability79
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 651 tokens (~81/item across 8 items; 8 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 Coverage86
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 52% of tool parameters carry a description.Partial
- 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
- All 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.Pass
- An AI judge read all 9 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 WebhookTest.net MCP server?
WebhookTest.net is a hosted endpoint at https://webhooktest.net/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 · webhooktest.net
claude mcp add --transport http net-webhooktest-webhook-tester 'https://webhooktest.net/mcp'
{
"mcpServers": {
"net-webhooktest-webhook-tester": {
"url": "https://webhooktest.net/mcp"
}
}
} {
"servers": {
"net-webhooktest-webhook-tester": {
"type": "http",
"url": "https://webhooktest.net/mcp"
}
}
} [mcp_servers.net-webhooktest-webhook-tester] url = "https://webhooktest.net/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"net-webhooktest-webhook-tester": {
"type": "remote",
"url": "https://webhooktest.net/mcp",
"enabled": true
}
}
} openclaw mcp add net-webhooktest-webhook-tester --url 'https://webhooktest.net/mcp' --transport streamable-http
mcp_servers:
net-webhooktest-webhook-tester:
url: "https://webhooktest.net/mcp" {
"McpServers": {
"net-webhooktest-webhook-tester": {
"Transport": "http",
"Url": "https://webhooktest.net/mcp"
}
}
} assistant mcp add net-webhooktest-webhook-tester -t streamable-http -u 'https://webhooktest.net/mcp'
{
"mcpServers": {
"net-webhooktest-webhook-tester": {
"type": "http",
"url": "https://webhooktest.net/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.
- 24 Sept 26 0
- Server version: 1.0.0 → 1.0.1 functional
- 21 Sept 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Schema quality: 71 → 81 ▼ functional
- “create_webhook_bucket” added an optional parameter “controlled_test” cosmetic
- 18 Sept 26 +55
- Authorization: unverified → fail ▼ critical
- Injection markers: unverified → pass ▲ security
- Stability: unverified → pass ▲ security
- Transport: fail → pass ▲ security
- Endpoint reachability: not serving MCP → reachable ▲ functional
- Tool coverage: unverified → 100 ▲ functional
- MCP protocol: unverified → pass ▲ functional
- 17 Sept 26 −55
- Endpoint reachability: reachable → not serving MCP ▼ security
- Stability: pass → unverified ▼ security
- Authorization: fail → unverified ▼ security
- Tool safety: pass → unverified ▼ security
- Transport: pass → fail ▼ security
- Capabilities: pass → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- First check of Schema quality: unverified functional
- 2 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 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 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 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.
- 26 Aug 26 75
- 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 24 Sept 2026 · Probed https://webhooktest.net/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=webhooktest.net | CN=WE1,O=Google Trust Services,C=US | 22 Sept 2026 | 21 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | 6cfd9ec38e9462ed13e4ea2d4feddb21 |
| SANs: webhooktest.net, *.webhooktest.net | ||||||
| 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 webhooktest.net. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| net. | present | 37331 | 13 | Verified |
| webhooktest.net. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
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 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://webhooktest.net/mcp | Verified | 200 | |
| http (plaintext) | http://webhooktest.net/mcp | HTTPS enforced | 301 | https://webhooktest.net/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 →
clear_webhooks Clear captured webhooks ~45
Permanently delete every capture in a bucket. Requires confirm=true.
| Name | Type | Req | Description |
|---|---|---|---|
| bucket_id | string | yes | – |
| confirm | boolean | yes | must be true to perform this destructive action |
| Name | Type | Req | Description |
|---|---|---|---|
| error | null|object | – | – |
| success | boolean | – | – |
No examples provided.
configure_webhook_response Configure webhook response ~107
Set the status, content type, body, safe response headers, and a delay up to 10 seconds returned by the webhook endpoint.
| Name | Type | Req | Description |
|---|---|---|---|
| body | string | yes | – |
| bucket_id | string | yes | – |
| content_type | string | yes | – |
| delay_ms | integer | – | response delay in milliseconds, from 0 to 10000 |
| headers | object | – | optional response headers; server-managed and hop-by-hop headers are rejected |
| status | integer | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| error | null|object | – | – |
| success | boolean | – | – |
No examples provided.
create_webhook_bucket Create webhook bucket ~74
Create an anonymous temporary webhook capture bucket. The returned bucket ID is a bearer capability and expires after 15 days of inactivity.
| Name | Type | Req | Description |
|---|---|---|---|
| controlled_test | boolean | – | set true only for maintainer QA or automated evaluations; not for a real user's first test |
| name | string | – | optional display name for the bucket |
| Name | Type | Req | Description |
|---|---|---|---|
| dashboard_url | string | – | – |
| error | null|object | – | – |
| id | string | – | – |
| inactivity_policy | string | – | – |
| name | string | – | – |
| webhook_endpoint | string | – | – |
No examples provided.
delete_webhook_bucket Delete webhook bucket ~48
Permanently delete a bucket and all of its captures. Requires confirm=true.
| Name | Type | Req | Description |
|---|---|---|---|
| bucket_id | string | yes | – |
| confirm | boolean | yes | must be true to perform this destructive action |
| Name | Type | Req | Description |
|---|---|---|---|
| error | null|object | – | – |
| success | boolean | – | – |
No examples provided.
get_webhook Get captured webhook ~89
Read one webhook capture scoped to its bucket. Sensitive headers and query values are redacted by default.
| Name | Type | Req | Description |
|---|---|---|---|
| bucket_id | string | yes | – |
| include_sensitive | boolean | – | return sensitive header and query values; defaults to false |
| max_body_bytes | integer | – | maximum body bytes to return; defaults to 65536 and cannot exceed 262144 |
| webhook_id | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| error | null|object | – | – |
| webhook | null|object | – | – |
No examples provided.
get_webhook_bucket Get webhook bucket ~32
Read a bucket name and its configured HTTP response settings.
| Name | Type | Req | Description |
|---|---|---|---|
| bucket_id | string | yes | bucket capability ID |
| Name | Type | Req | Description |
|---|---|---|---|
| dashboard_url | string | – | – |
| error | null|object | – | – |
| id | string | – | – |
| name | string | – | – |
| response_body | string | – | – |
| response_content_type | string | – | – |
| response_delay_ms | integer | – | – |
| response_headers | object | – | – |
| response_status | integer | – | – |
| webhook_endpoint | string | – | – |
No examples provided.
list_webhooks List captured webhooks ~62
List webhook capture summaries in newest-first order using cursor pagination.
| Name | Type | Req | Description |
|---|---|---|---|
| bucket_id | string | yes | – |
| cursor | string | – | opaque cursor returned by a previous call |
| limit | integer | – | number of summaries to return, from 1 to 50 |
| Name | Type | Req | Description |
|---|---|---|---|
| dashboard_url | string | – | – |
| error | null|object | – | – |
| has_more | boolean | – | – |
| next_cursor | string | – | – |
| webhooks | null|array | – | – |
No examples provided.
wait_for_webhook Wait for a webhook ~94
Return the latest capture, wait for a newer capture, or report received=false after the timeout.
| Name | Type | Req | Description |
|---|---|---|---|
| after_webhook_id | string | – | wait for a capture newer than this webhook ID |
| bucket_id | string | yes | – |
| include_sensitive | boolean | – | – |
| max_body_bytes | integer | – | – |
| wait_seconds | integer | – | seconds to wait; defaults to 20 and cannot exceed 25 |
| Name | Type | Req | Description |
|---|---|---|---|
| error | null|object | – | – |
| received | boolean | yes | – |
| webhook | null|object | – | – |
No examples provided.
What is the WebhookTest.net MCP server?
WebhookTest.net is an MCP server listed in the public MCP registry as net.webhooktest/webhook-tester. Anonymous webhook capture, inspection, waiting, and response configuration for AI agents. This page covers its hosted endpoint (https://webhooktest.net/mcp).
Is the WebhookTest.net MCP server safe to use?
WebhookTest.net scores 78 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 WebhookTest.net MCP server expose?
WebhookTest.net exposes 8 tools: clear_webhooks, configure_webhook_response, create_webhook_bucket, delete_webhook_bucket, get_webhook, and 3 more. Their descriptions and schemas cost roughly 551 tokens of context every time the server is loaded.
Does the WebhookTest.net MCP server require authentication?
No. We connected to WebhookTest.net without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the WebhookTest.net MCP server still maintained?
WebhookTest.net is still listed as active in the MCP registry. We last reached this channel on 24 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.