oganvil — OG (Open Graph) Image Generation API
REMOTE · OGANVIL.ROWB.APP · SCANNED OCT 4
Generates 1200x630 OG social preview images (PNG/SVG). Tools: generate_og_image, get_quota.
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 Security71
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation is enforced on tool calls, but the challenge carries no valid RFC 9728 metadata, so a client cannot discover where to get a token. See how to fix → View diagnostics → Fail
- HTTPS enforcement could not be verified: the plaintext port answered with HTTP 405, 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
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 116 tokens (~58/item across 2 items; 2 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management40
- Stability observed for 12 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
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 2 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 2 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the oganvil — OG (Open Graph) Image Generation API MCP server?
oganvil — OG (Open Graph) Image Generation API is a hosted endpoint at https://oganvil.rowb.app/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 · oganvil.rowb.app
claude mcp add --transport http app-rowb-oganvil-og-image-api 'https://oganvil.rowb.app/mcp'
{
"mcpServers": {
"app-rowb-oganvil-og-image-api": {
"url": "https://oganvil.rowb.app/mcp"
}
}
} {
"servers": {
"app-rowb-oganvil-og-image-api": {
"type": "http",
"url": "https://oganvil.rowb.app/mcp"
}
}
} [mcp_servers.app-rowb-oganvil-og-image-api] url = "https://oganvil.rowb.app/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"app-rowb-oganvil-og-image-api": {
"type": "remote",
"url": "https://oganvil.rowb.app/mcp",
"enabled": true
}
}
} openclaw mcp add app-rowb-oganvil-og-image-api --url 'https://oganvil.rowb.app/mcp' --transport streamable-http
mcp_servers:
app-rowb-oganvil-og-image-api:
url: "https://oganvil.rowb.app/mcp" {
"McpServers": {
"app-rowb-oganvil-og-image-api": {
"Transport": "http",
"Url": "https://oganvil.rowb.app/mcp"
}
}
} assistant mcp add app-rowb-oganvil-og-image-api -t streamable-http -u 'https://oganvil.rowb.app/mcp'
{
"mcpServers": {
"app-rowb-oganvil-og-image-api": {
"type": "http",
"url": "https://oganvil.rowb.app/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.
- 3 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.
- 1 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.
- 29 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.
- 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
- 27 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.
- 25 Sept 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
- 23 Sept 26 +1
- Stability: unverified → 0.03 ▲ functional
- 22 Sept 26 71
First indexed and scored.
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 Oct 2026 · Probed https://oganvil.rowb.app/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=rowb.app | CN=WE1,O=Google Trust Services,C=US | 21 Sept 2026 | 20 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | 78dc567479cfd1080e5a0bd336e4a423 |
| SANs: rowb.app, oganvil.rowb.app, *.oganvil.rowb.app | ||||||
| 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 oganvil.rowb.app. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| app. | present | 23684 | 8 | Verified |
| rowb.app. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Challenged, unverified
The endpoint asked for a token, but we could not retrieve and validate the RFC 9728 metadata that tells a client how to obtain one.
| Result | Challenged, unverified |
|---|---|
| Enforced | On tool calls |
| HTTP status | 200 |
WWW-Authenticate challenge Bearer realm="oganvil", resource_metadata="https://oganvil.rowb.app/.well-known/oauth-protected-resource"
Bearer realm="oganvil", resource_metadata="https://oganvil.rowb.app/.well-known/oauth-protected-resource"Protected resource metadata
| Document | https://oganvil.rowb.app/.well-known/oauth-protected-resource |
|---|---|
| Retrieved | Yes |
| Problem | metadata_incomplete |
| Resource | https://oganvil.rowb.app/mcp |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://oganvil.rowb.app/mcp | Verified | 200 | |
| http (plaintext) | http://oganvil.rowb.app/mcp | Inconclusive | 405 |
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 →
generate_og_image Generate OG image ~90
Generate a 1200x630 Open Graph image (PNG or SVG) from a title and tag line. Returns the image as MCP image content plus a hosted render URL. Counts against your monthly unique-image quota.
| Name | Type | Req | Description |
|---|---|---|---|
| format | string | – | Output format, default png |
| tag | string | – | Small subtitle line under the title |
| title | string | yes | Headline text rendered large |
No output schema declared.
No examples provided.
get_quota Get quota ~26
Return current monthly usage and plan limit for the authenticated key. Does not consume quota.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
What is the oganvil — OG (Open Graph) Image Generation API MCP server?
oganvil — OG (Open Graph) Image Generation API is an MCP server listed in the public MCP registry as app.rowb.oganvil/og-image-api. Generates 1200x630 OG social preview images (PNG/SVG). Tools: generate_og_image, get_quota. This page covers its hosted endpoint (https://oganvil.rowb.app/mcp).
Is the oganvil — OG (Open Graph) Image Generation API MCP server safe to use?
oganvil — OG (Open Graph) Image Generation API scores 77 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 oganvil — OG (Open Graph) Image Generation API MCP server expose?
oganvil — OG (Open Graph) Image Generation API exposes 2 tools: generate_og_image, get_quota. Their descriptions and schemas cost roughly 116 tokens of context every time the server is loaded.
Does the oganvil — OG (Open Graph) Image Generation API MCP server require authentication?
Yes. oganvil — OG (Open Graph) Image Generation API 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 oganvil — OG (Open Graph) Image Generation API MCP server still maintained?
oganvil — OG (Open Graph) Image Generation API is still listed as active in the MCP registry. We last reached this channel on 4 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.