canonical: https://jentic.com/apis/bklink.uk/bklink

# Bklink Uk mxverify BV API

The mxverify BV API returns a site's BV, the ranking benefit of one new followed link from that site under mxverify's published model, expressed in US dollars to the cent. It looks up one site by domain, up to 100 sites in a single request, or up to 1,000 sites in a bulk valuation job for partner keys. Each valued result carries the link level (A editorial, B guest or sponsored, C neutralised, D link network), what capped it, the model version, and an attribution block linking to the site's mxverify report. Sites mxverify has never valued are valued on demand, with the first answer returning a valuing status and a retry_after hint.

## For AI agents

Look up the BV link value of one site or a batch of sites, start partner bulk valuation jobs, and poll them for results with link level and attribution.

## Scope

Does not list a site's backlinks, track keyword rankings, or sell link placements. Use for looking up the BV link value of websites only.

## Capabilities

- Look up one site's BV link value by domain with GET `/api/v1/bv/{domain}`, valuing new sites on demand
- Value up to 100 targets in one request with POST `/api/v1/bv`, getting one result per target in the order sent
- Start a bulk valuation job of up to 1,000 targets on a partner key with POST `/api/v1/bv/valuations`
- Poll a bulk valuation job's progress and every site's answer so far with GET `/api/v1/bv/valuations/{id}`
- Read the link level (A, B, C, or D), caps, model version, and audited flag for each valued site
- Show the required 'BV by mxverify' attribution with the report_url returned for each valued or unrated result

## Use cases

### Link prospect scoring for an outreach agent through Jentic

A link-building agent that drafts outreach should only pitch sites worth a link. Through Jentic the agent finds the mxverify lookup by intent, sends its prospect list to POST `/api/v1/bv` in batches of up to 100 targets, and ranks the valued results by the usd figure and level. The mxverify key is injected at call time, so the agent never holds it.

Example prompt: Call POST `/api/v1/bv` with targets ['example-blog.com','news-site.co.uk','forum.example.org'], then return the targets with status 'valued' sorted by bv.usd descending

### Single-site checks before buying or placing a link

Before agreeing a sponsored placement, a marketer wants to know what one followed link from a site is worth. GET `/api/v1/bv/{domain}` returns the BV figure with its level and caps, such as nofollow lowering the level. A site mxverify has never valued returns valuing with HTTP 202 and retry_after, and a later lookup has the figure.

Example prompt: Call GET `/api/v1/bv/example-blog.com`; if status is 'valuing', wait retry_after seconds and call it again, then report bv.usd, bv.level, and bv.caps

### Bulk valuation of large link lists

Agencies auditing a backlink profile or a prospect database need many sites valued at once. On a partner key, POST `/api/v1/bv/valuations` starts a job of up to 1,000 targets; sites already valued are answered immediately and new ones are valued as the job reaches them. GET `/api/v1/bv/valuations/{id}` returns progress and every answer so far, with pending for sites not reached yet.

Example prompt: Call POST `/api/v1/bv/valuations` with a targets array of 600 domains, store the returned id, then poll GET `/api/v1/bv/valuations/{id}` until done equals total and summarise the results by level

## Key endpoints

| Method | Path | Description |
| --- | --- | --- |
| GET | `/api/v1/bv/{domain}` | Look up one site |
| POST | `/api/v1/bv` | Look up many sites |
| POST | `/api/v1/bv/valuations` | Start a bulk valuation job |
| GET | `/api/v1/bv/valuations/{id}` | Read a bulk valuation job |

## Key resources

- **BV results** — Per-site status, usd link value, level, caps, model version, and attribution
- **Valuation jobs** — Partner bulk jobs of up to 1,000 targets with progress and per-site answers

## AI readiness

This API is usable in Jentic One now. Its AI-readiness score against Jentic's framework shows where it stands today and where improvements would make it even easier for agents to use.

- **Score:** 68 / 100
- **Maturity:** AI-Aware
- **Dimensions:**
  - Foundational Compliance: 90 / 100
  - Developer Experience & Jentic Compatibility: 65 / 100
  - AI-Readiness & Agent Experience: 55 / 100
  - Agent Usability: 94 / 100
  - Security: 55 / 100
  - AI Discoverability: 66 / 100
- **View full report:** https://jentic.com/apis/bklink.uk/bklink/scorecard
- **How the score is calculated:** https://docs.jentic.com/reference/api-readiness-framework/overview/
- **More about the dimensions:** https://docs.jentic.com/reference/api-readiness-framework/specification/#dimensional-model-overview

### Score it yourself

Every API in the directory is allowlisted, so you can re-score it with no key required.

- **Score your own API:** https://jentic.com/scorecard.md
- **Scoring CLI agent skill:** https://github.com/jentic/jentic-api-scorecard/blob/main/skills/jentic-api-scorecard/SKILL.md

```sh
npx @jentic/api-scorecard-cli score <openapi-url>
```

## Why Jentic

- **Setup:** Wiring mxverify by hand means handling its key in either the bearer or X-API-Key form, and coding the valuing and retry_after flow for sites it has not valued yet. Through Jentic you install once, import the mxverify BV API from the API Directory, store the key once, and your agent calls it.
- **Permission scoping:** The single-site lookup puts the domain in the URL path, so a rule can pin your agent to one site's lookup, while batch lookups carry targets in the request body and are bounded by operation only. You choose the operations it may call, so paid bulk valuation jobs are not included unless you add them.
- **Credential handling:** Your mxverify key is stored once, encrypted, by your own Jentic One instance and injected at execution time. It never enters the agent's prompt, logs, or context.
- **Discovery method:** Agents search Jentic by intent such as 'what is a link from this site worth' or 'value a list of domains', and Jentic returns the matching mxverify operation with its input schema so the agent calls the right endpoint without browsing the reference docs.

## Related APIs

- **Moz API** — Domain authority and link metrics
- **Majestic API** — Backlink index with Trust Flow and Citation Flow
- **Open PageRank API** — Free PageRank-style domain scores
- **Ahrefs API** — Backlink profiles and referring domains

## FAQ

### Is there a mxverify BV MCP server?

You don't need an MCP server to give your agent the mxverify BV API. Jentic connects it directly from the API Directory: import it, store your key once, and your agent calls it. Operations are discovered on demand, so no extra tool definitions sit in the agent's context.

### What authentication does the mxverify BV API use?

Per its OpenAPI spec, the API accepts a key from bklink either as a bearer token in the Authorization header (Authorization: Bearer mxk_...) or as the same key in the X-API-Key header. Through Jentic, the key is stored encrypted by your own Jentic One instance and injected at call time.

### What does a BV figure mean?

BV is the ranking benefit of one new followed link from the site under mxverify's published model, given in usd to the cent. It is not a price. Each figure comes with a level (A editorial, B guest or sponsored, C neutralised, D link network), caps explaining what lowered the level, and the model version. Wherever you show a BV, show 'BV by mxverify' linked to the site's report.

### Can I limit what my agent is allowed to do with the mxverify BV API?

Yes. Write a rule that allows only GET `/api/v1/bv/{domain}` and POST `/api/v1/bv`, so the agent can look up sites but cannot start paid bulk valuation jobs, and every call it makes is logged. You can also pin the single-site lookup to one domain path, such as `/api/v1/bv/example.com.`

### What are the rate limits for the mxverify BV API?

Per the OpenAPI spec, a free key gives 1,000 lookups and 25 new valuations a day, and the partner tier adds volume and bulk valuation jobs paid per call from a bklink wallet. Each target in a multi-site request counts as one lookup, while reading a job is not a lookup. See https://bklink.uk/docs/api for current terms.

### How do I value a list of sites through Jentic?

Search Jentic for 'look up the link value of many sites', load the lookupSites operation, and call POST `/api/v1/bv` with a targets array of up to 100 website addresses. Results come back in the order sent. To run it on your own infrastructure, install Jentic One from its GitHub repo.