Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add bobadilla-tech/requiems-api-skills --skill mx-lookup-post-batchgit clone --depth 1 https://github.com/bobadilla-tech/requiems-api-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/bobadilla-tech/requiems-api-skills/mx-lookup-post-batch)<a href="https://agentmods.dev/skills/bobadilla-tech/requiems-api-skills/mx-lookup-post-batch"><img src="https://agentmods.dev/badge/skills/bobadilla-tech/requiems-api-skills/mx-lookup-post-batch/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/bobadilla-tech/requiems-api-skills/mx-lookup-post-batch"><img src="https://agentmods.dev/badge/skills/bobadilla-tech/requiems-api-skills/mx-lookup-post-batch.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00046 | $0.00757 |
| Opus 5 | $0.00023 | $0.00378 |
| Sonnet 5 | $0.00009 | $0.00151 |
| Haiku 4.5 | $0.00005 | $0.00076 |
Grade A, and why
mx-lookup-post-batch scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Endpoint
POST https://requiems.xyz/v1/networking/mx/batch
Batch MX Lookup
Retrieve MX records for up to 50 domains in a single request. Results for each domain are sorted by priority ascending (lowest numeric value has the highest mail delivery priority per RFC 5321).
Parameters
| Name | Type | Required | Location | Description |
|---|---|---|---|---|
domains |
array | yes | body | Array of domains to lookup (min: 1, max: 50). |
Request Example
{
"domains": ["outlook.com", "yahoo.com"]
}
Response Example
{
"data": {
"results": [
{
"domain": "outlook.com",
"found": true,
"data": {
"domain": "outlook.com",
"records": [
{
"host": "outlook-com.olc.protection.outlook.com.",
"priority": 5
}
]
}
},
{
"domain": "yahoo.com",
"found": true,
"data": {
"domain": "yahoo.com",
"records": [
{
"host": "mta5.am0.yahoodns.net.",
"priority": 1
},
{
"host": "mta7.am0.yahoodns.net.",
"priority": 1
},
{
"host": "mta6.am0.yahoodns.net.",
"priority": 1
}
]
}
}
}
],
"total": 2
},
"metadata": {
"timestamp": "2026-05-13T21:34:51Z"
}
}
Response Fields
| Field | Type | Description |
|---|---|---|
results |
array | MX lookup results for each input domain, in the same order as the input. |
results[].domain |
string | The domain name that was queried. |
results[].found |
boolean | Whether MX records were found for the domain. |
results[].error |
string | Error message if the lookup failed. Empty if found is true. |
results[].data |
object | MX lookup data. Present only when found is true. |
results[].data.domain |
string | The domain name associated with the MX records. |
results[].data.records |
array | List of MX records sorted by priority ascending (lower value means higher priority). |
results[].data.records[].host |
string | Hostname of the mail server. |
results[].data.records[].priority |
number | Priority of the mail server. Lower value means higher priority. |
total |
number | Total number of results returned. |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 101 lines · 46 tokens per session scan A 29f29e729238
mx-lookup-post-batch is a skill published in the GitHub repository bobadilla-tech/requiems-api-skills (2 stars, last pushed 2d ago), licensed MIT. It adds 46 tokens to every session and 757 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-08.
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