agent4.io
agent4.io builds agentic AI for businesses that sell expertise — agents that answer from your own documents on your site, Telegram and WhatsApp, remember every customer, and follow up on schedule.
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Last probed Sep 14, 2026 · api.agent4.io
50tools discovered
Showing 25 of 50 from the live probe.
List Agents
List all agents in this tenant (name + published state).
Get Agent
Get one agent's full configuration (soul/task/tools/skills/knowledge_bases/model/params).
Create Agent
Create an agent. `name` is lower-cased on save — it is a key, not a display name. soul = persona/identity; task = duties and boundaries; tools = tool-name whitelist (check list_tools first; the system tools time/geo/weather **and `compute_chart`** are **auto-enabled by default**, no need to list them — but note that passing `tools` at all replaces that default list, so include them yourself if you pass any); knowledge_bases = attached knowledge base names (once attached
Update Agent
Update **part** of an agent — fields you don't pass stay as they are. ⚠️ List-field semantics, don't mix them up: `tools=[...]` / `skills=[...]` / `knowledge_bases=[...]` are **full-list replacement** — items you didn't read first get pushed out. To "add one / remove one", use `add_tools` / `remove_tools` (and add_/remove_skills, add_/remove_knowledge_bases): incremental, idempotent, leaves the rest untouched. After the call, **read the response** to verify the final list —
List Tools
List tool names assignable to agents, with their descriptions (incl. the tenant's connected MCP tools).
List Mcp Servers
List the MCP servers connected in this tenant's tool library (read-only; secret fields omitted).
Create Share
Create a **share / integration entry point** for an agent — this is how end users actually reach it. **`published=True` only means "visible", not "reachable"**: for end users to talk to the agent you must create a share. The response carries a directly openable chat link (`{public_base}/s/<token>`) and the website embed URL (`{public_base}/embed/<token>`). For a website widget, paste one line before </body>: `<script src="{public_base}/embed.js" data-token="<token>"></script
List Shares
List an agent's shares (token / label / disabled / chat link / embed URL / appearance config). When the top-level `pretty_url` is non-empty it is the preferred link to give humans (see create_share).
Configure Share
Configure this share — its name and its **appearance** — fields you don't pass stay as they are (server-side partial merge). - `label`: the name at the top of the chat page, and the browser tab's title. **Renaming a share is this call**; you never need to create a replacement and delete the old one. That would mint a new token, so the link already embedded in the client's site would stop working — the visible name and the address are not the same thing. - `theme_co
Set Pwa Branding
Configure a specific **agent's** PWA branding and install experience (applies to that agent's `/s/` standalone chat pages — what gets installed to the home screen is one agent's entry page, so each agent is its own app). - `agent`: the agent name whose install branding to configure (required). - `icon_source_url`: public URL of one master image (PNG/JPG/WebP ≥192×192, ideally a square logo). The server derives the full set: browser-tab favicon(48) + install icons 192/512 +
Set Custom Domain
Bind the client's own domain to this tenant's chat pages: `https://chat.client.com/` serves the tenant's branded page (or a specific agent's chat), the address bar keeps the client's domain, and the TLS certificate is issued automatically. **Have the client configure DNS first**: add a CNAME at their DNS provider pointing to the `cname_target` in the response (`endpoint.agent4.io`). Key points: - **Subdomains only** (`chat.client.com`). An apex domain (`client.com`) cannot c
List Skills
List this tenant's skills.
Get Skill
Get one skill's full content (including the complete instructions text).
Create Skill
Create a skill. description = "when to use" (goes into the system prompt, keep it short); instructions = the detailed guide (fetched on demand via load_skill). The paradigm (important): instructions are visible only AFTER the model calls load_skill — if calling some tool is **mandatory** ("user gives a phone number → must call save_contact"), the trigger must be written into description, otherwise models often answer directly without loading the skill and the rule never take
Update Skill
Update part of a skill — fields you don't pass stay as they are (server-side PATCH merge, no GET+PUT round-trip). ⚠️ `tools=[...]` is **full-list replacement**; to add/remove one use `add_tools`/`remove_tools` (incremental, idempotent). Tools bound to a skill take effect automatically at chat time on any agent the skill is attached to — no need to also add them to the agent's tools.
Test Skill Trigger
Reality-check whether your prompts actually trigger tool calls (dry-run) — run this after writing/changing a skill instead of counting corpses in production. Replays your messages N times against the **production** system-prompt assembly, tool schemas and this tenant's actual model routing, capturing only the model's tool-call decision: **tool side effects are NOT executed**, no session is stored. Tokens count toward the tenant quota (messages≤5, samples≤5, at most 25 calls
List Knowledge Bases
List this tenant's knowledge bases (with doc/chunk counts and relevance cutoff).
Get Knowledge Base
Get one knowledge base's configuration (including the full instructions text shown to the model).
Create Knowledge Base
Create a knowledge base. **Write `description` — it is what routes questions to this base.** Before each answer the platform reads every attached base's `description` and decides which ones this question needs; a base whose description is vague or blank gets searched when it should not, or missed when it should. One line, in the words a visitor would use, naming the subject **and the boundary**: "Country-by-country medical device registration requirements — not company or pr
Update Knowledge Base
Update part of a knowledge base — fields you don't pass stay as they are (server-side PATCH merge).
Add Knowledge Text
Add a **text** document to a knowledge base (chunking + embedding happen synchronously; returns the real chunk count). For **local files** (pdf/docx…) see `add_knowledge_file`.
Add Knowledge File
Add a local file's content to a knowledge base (txt/md/html/pdf/docx). **This MCP runs on the platform server and cannot read paths on YOUR machine.** For text files, read the content yourself and call `add_knowledge_text`; for binaries (pdf/docx), upload via the console, or curl `/knowledge-bases/{name}/documents/upload`. **To ingest a whole folder, zip it and send that one endpoint** — subdirectories are walked, md/txt/pdf/html/docx are ingested one by one, and document n
Search Knowledge Base
Search this knowledge base; returns matching chunks with distances. Uses **exactly the same retrieval path as real conversations** — use it to validate the cutoff and chunking: an empty result means this question will be judged "not covered" and the agent will answer "not in the knowledge base".
Build Knowledge Index
Build (or rebuild) the structured index for a knowledge base — the second leg beside vector search. Vector search answers "what does this passage say". It **cannot count, filter numerically or aggregate**, so "how many documents", "which ones are between 1000 and 2000 words", "how many per category" are not answered badly — they are structurally unanswerable. This builds a small per-KB table from whatever structured header the documents share, which the agent can then query
Get Knowledge Index
Show the structured index profile: per column coverage, type, numeric range, top values, warnings. **The warnings are the point.** On a real 4,500-document catalogue this surfaced three data problems nobody knew about: 1,058 documents with `page_count` 0, 505 with `reading_level` 0, 493 with `word_count` 0 — those are not zeros, they are missing values recorded as 0, and they silently poison every average, minimum and range filter built on them. Report the warnings to the u
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Directory coverage for brandsagent4.io builds agentic AI for businesses that sell expertise — agents that answer from your own documents on your site, Telegram and WhatsApp, remember every customer, and follow up on schedule.
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