> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ngnmarket.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Historical Forex Rates
> Retrieve historical NGN exchange rates by currency pair and date range.
This endpoint gives you historical exchange rate data between NGN and any supported currency pair. You can narrow results by currency code, date range (`from`/`to`), and record count, making it straightforward to populate charts, backtest models, or power rate-change alerts.
The `source` and `target` parameters default to `USD` and `NGN` respectively. Pass both to query any supported pair in either direction. This endpoint requires a Starter plan or higher.
For example, to fetch GBP/NGN rates for Q1 2026:
```bash curl theme={null}
curl "https://api.ngnmarket.com/v1/forex/history?source=GBP&target=NGN&from=2026-01-01&to=2026-03-31" \
-H "Authorization: Bearer ngm_live_YOUR_KEY"
```
```javascript JavaScript theme={null}
const url = new URL('https://api.ngnmarket.com/v1/forex/history');
url.searchParams.set('source', 'GBP');
url.searchParams.set('target', 'NGN');
url.searchParams.set('from', '2026-01-01');
url.searchParams.set('to', '2026-03-31');
const res = await fetch(url, {
headers: { Authorization: 'Bearer ngm_live_YOUR_KEY' },
});
const { data } = await res.json();
```
```python Python theme={null}
import requests
res = requests.get(
'https://api.ngnmarket.com/v1/forex/history',
params={
'source': 'GBP',
'target': 'NGN',
'from': '2026-01-01',
'to': '2026-03-31',
},
headers={'Authorization': 'Bearer ngm_live_YOUR_KEY'},
)
data = res.json()['data']
```
## OpenAPI
````yaml GET /forex/history
openapi: 3.1.0
info:
title: NGN Market API
version: '1.0'
description: >
The NGN Market API provides programmatic access to Nigerian Exchange Group
(NGX) market data, including equities, forex rates, company profiles,
indices, bonds, and financial news.
## Base URL
All endpoints are served from:
```
https://api.ngnmarket.com/v1
```
## Authentication
Every request requires a Bearer token in the `Authorization` header:
```
Authorization: Bearer ngm_live_YOUR_KEY
```
Generate and manage your API keys from the [developer
dashboard](https://ngnmarket.com/developer).
## Plans & Quotas
| Plan | Monthly Calls | Requests/min | Price |
| :--- | ---: | ---: | :--- |
| Free | 3,000 | 30 | Free |
| Hobby | 10,000 | 60 | ₦15,000/mo |
| Starter | 100,000 | 120 | ₦50,000/mo |
| Growth | 500,000 | 200 | ₦200,000/mo |
| Business | 2,000,000 | 300 | ₦700,000/mo |
| Enterprise | Unlimited | Unlimited | Custom |
Every response includes a `meta` object showing your current usage and
remaining quota. Exceeding the per-minute rate limit returns `429
RATE_LIMITED`. Exceeding the monthly quota returns `429 QUOTA_EXCEEDED`.
## Response Envelope
All responses use a consistent JSON envelope:
```json
{
"success": true,
"data": { ... },
"meta": {
"plan": "starter",
"calls_used": 4821,
"calls_remaining": 95179,
"reset_at": "2026-05-01T00:00:00.000Z"
}
}
```
contact:
name: NGN Market Support
email: support@ngnmarket.com
url: https://ngnmarket.com
license:
name: Proprietary
servers:
- url: https://api.ngnmarket.com/v1
description: Production
security:
- BearerAuth: []
tags:
- name: Market
description: >-
Daily market snapshots, top trades, movers, market breadth, sectors, and
YTD performers.
- name: Companies
description: >-
Browse, search, and retrieve profiles, price charts, and financial
statements for NGX-listed companies.
- name: Forex
description: Current and historical NGN exchange rates against major currencies.
- name: Indices
description: >-
All NGX market indices, including list, detail with constituents, and
historical chart data.
- name: ETFs
description: >-
NGX-listed Exchange Traded Funds and ETPs — list, full fund detail, and
historical daily price data.
- name: Bonds
description: >-
NGX-listed bond instruments with issuer details, coupon rates, and
maturity dates.
- name: Disclosures
description: >-
Official corporate filings from NGX-listed companies (financial
statements, AGM notices, board meetings, director dealings, earnings
forecasts). Sourced from NGX Group and updated twice daily.
- name: Blog
description: >-
Published NGN Market blog posts. List, search, and filter by category or
company.
- name: Dividends
description: >-
Market-wide NGX dividend calendar. Browse upcoming and recently paid
dividends across all listed companies with optional search and pagination.
- name: Account
description: >-
Quota status, 30-day request analytics, and paginated request logs for the
authenticated user.
paths:
/forex/history:
get:
tags:
- Forex
summary: Historical NGN forex rates
description: >
Returns historical exchange rate data between NGN and any supported
currency pair. Narrow results by currency code, date range, and record
count.
**Plan required:** Hobby
operationId: getForexHistory
parameters:
- name: source
in: query
description: Source currency code (e.g. `USD`, `EUR`, `GBP`). Defaults to `USD`.
required: false
schema:
type: string
default: USD
example: USD
- name: target
in: query
description: Target currency code. Defaults to `NGN`.
required: false
schema:
type: string
default: NGN
example: NGN
- name: currency
in: query
description: >-
Shorthand currency filter when querying NGN-based rates. Overridden
by explicit `source`/`target`.
required: false
schema:
type: string
- name: from
in: query
description: Start date in `YYYY-MM-DD` format (inclusive).
required: false
schema:
type: string
format: date
example: '2026-01-01'
- name: to
in: query
description: End date in `YYYY-MM-DD` format (inclusive). Defaults to today.
required: false
schema:
type: string
format: date
example: '2026-04-17'
- name: limit
in: query
description: Maximum number of records to return.
required: false
schema:
type: integer
responses:
'200':
description: Historical forex rates retrieved successfully.
content:
application/json:
schema:
allOf:
- $ref: '#/components/schemas/SuccessEnvelope'
- type: object
properties:
data:
type: array
items:
$ref: '#/components/schemas/ForexRate'
examples:
usdNgnHistory:
summary: Recent USD/NGN rates
value:
success: true
data:
- date: '2026-04-17'
currency: USD
rate: 0.000623
- date: '2026-04-16'
currency: USD
rate: 0.000621
- date: '2026-04-15'
currency: USD
rate: 0.000619
meta:
plan: starter
calls_used: 4821
calls_remaining: 95179
reset_at: '2026-05-01T00:00:00.000Z'
'400':
description: Invalid currency code.
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorEnvelope'
example:
success: false
error:
code: INVALID_CURRENCY
message: Invalid currency code.
validCurrencies:
- USD
- EUR
- GBP
- CAD
'401':
$ref: '#/components/responses/Unauthorized'
'403':
$ref: '#/components/responses/PlanRequired'
'429':
$ref: '#/components/responses/QuotaExceeded'
'500':
$ref: '#/components/responses/ServerError'
components:
schemas:
SuccessEnvelope:
type: object
required:
- success
properties:
success:
type: boolean
const: true
meta:
$ref: '#/components/schemas/Meta'
ForexRate:
type: object
properties:
date:
type: string
format: date
currency:
type: string
rate:
type: number
ErrorEnvelope:
type: object
required:
- success
- error
properties:
success:
type: boolean
const: false
error:
type: object
required:
- code
- message
properties:
code:
type: string
description: Machine-readable error identifier.
example: NOT_FOUND
message:
type: string
description: Human-readable error description.
example: Resource not found.
required_plan:
type: string
description: _(PLAN_REQUIRED only)_ Minimum plan needed.
current_plan:
type: string
description: _(PLAN_REQUIRED only)_ Your current plan.
Meta:
type: object
description: Quota and plan metadata included on every authenticated response.
properties:
plan:
type: string
description: Current plan name.
enum:
- free
- starter
- growth
- business
- enterprise
example: starter
calls_used:
type: integer
description: Total calls made this calendar month across all your keys.
example: 4821
calls_remaining:
type: integer
description: Calls remaining before your quota is exhausted.
example: 95179
reset_at:
type: string
format: date-time
description: ISO 8601 UTC timestamp of your next quota reset (1st of next month).
example: '2026-05-01T00:00:00.000Z'
responses:
Unauthorized:
description: Missing or invalid API key.
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorEnvelope'
examples:
missingKey:
summary: Missing Authorization header
value:
success: false
error:
code: MISSING_API_KEY
message: 'Provide your API key via: Authorization: Bearer '
invalidKey:
summary: Invalid or revoked key
value:
success: false
error:
code: INVALID_API_KEY
message: API key not found or revoked.
PlanRequired:
description: Endpoint requires a higher plan.
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorEnvelope'
example:
success: false
error:
code: PLAN_REQUIRED
message: This endpoint requires a starter plan or higher.
required_plan: starter
current_plan: free
QuotaExceeded:
description: Monthly call limit reached.
content:
application/json:
schema:
allOf:
- $ref: '#/components/schemas/ErrorEnvelope'
- type: object
properties:
meta:
$ref: '#/components/schemas/Meta'
example:
success: false
error:
code: QUOTA_EXCEEDED
message: >-
Monthly call limit of 100,000 reached. Resets on
2026-05-01T00:00:00.000Z.
meta:
plan: starter
calls_used: 100000
calls_remaining: 0
reset_at: '2026-05-01T00:00:00.000Z'
ServerError:
description: Unexpected server-side failure. Safe to retry with backoff.
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorEnvelope'
example:
success: false
error:
code: SERVER_ERROR
message: Something went wrong on our end. Please try again.
securitySchemes:
BearerAuth:
type: http
scheme: bearer
bearerFormat: ngm_live_*
description: >
Pass your API key as a Bearer token: `Authorization: Bearer
ngm_live_YOUR_KEY`.
Generate keys at
[ngnmarket.com/dashboard/developer](https://ngnmarket.com/developer).
````